# Martyn’s Law for Parks & Indoor Facilities Explained

> Is your parks team ready for Martyn's Law? OnePlan helps you meet compliance requirements for events on council land. Start preparing today.

**Published:** 2026-09-27 | **Updated:** 2026-10-31 | **Author:** oneplansync
**URL:** https://www.oneplan.io/articles/martyns-law-parks-and-rec
**Type:** post

**Categories:** Event safety and compliance

![Martyn’s Law for Parks & Indoor Facilities Explained](https://oneplan.sites.aigrowthagent.co/wp-content/uploads/sites/80/2026/09/1788789638613-c56b0976f25a-1024x572.webp)

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## Content

*Written by: Paul Foster, Founder, CEO, OnePlan*

## Key Takeaways

- Martyn’s Law (Terrorism (Protection of Premises) Act 2025) introduces new duties for UK premises and events from spring 2027. Open-access public parks are generally exempt while access remains uncontrolled.
- Indoor facilities within parks, such as community centres and sports halls, usually fall under the standard tier once capacity reaches 200–799. Premises with 800+ capacity or controlled-entry events trigger enhanced-tier requirements.
- Qualifying events in parks involve 800+ attendees with controlled entry through tickets, paid admission, passes, or guest lists. Third-party organisers are usually responsible, and councils should document responsibilities and request evidence of compliance.
- Preparation focuses on auditing assets, assigning responsible persons, creating public protection procedures, training staff, and keeping clear compliance records for the SIA.
- OnePlan helps parks and recreation teams build accurate, to-scale site plans, calculate capacities, and manage compliance documentation. [**Book a 15-minute demo**](https://www.oneplan.io/book-demo/?utm_term=martyns-law-parks-and-rec&utm_campaign=ai_growth_agent) to see how it supports Martyn’s Law readiness.

## How Martyn’s Law Applies To Parks And Indoor Facilities

Open public parks are generally exempt from Martyn’s Law, but the exemption is narrower than many teams expect. [Schedule 2 to the Act excludes “parks, gardens and other open-air premises used for recreation or leisure”](https://www.gov.uk/government/publications/the-terrorism-protection-of-premises-act-2025/terrorism-protection-of-premises-act-2025-statutory-guidance) from scope only when they remain open access with no measures to secure or check that access is restricted. A typical public park with freely accessible entrances and no ticket barriers sits outside the premises duty.

[The Act’s definition of premises requires a building on the site that is accessible to the public](https://www.gov.uk/government/publications/the-terrorism-protection-of-premises-act-2025/terrorism-protection-of-premises-act-2025-statutory-guidance), and the exclusion applies only to open-air spaces without access controls. Parks and recreation departments therefore need to assess each asset individually, including indoor buildings and any fenced or controlled areas.

| Scenario | In Scope? | Applicable Tier |
| --- | --- | --- |
| [Open public park, freely accessible, no entry controls](https://www.gov.uk/government/publications/the-terrorism-protection-of-premises-act-2025/terrorism-protection-of-premises-act-2025-statutory-guidance) | No | N/A |
| [Park with fenced, controlled entry (paid admission), 200–799 expected](https://www.gov.uk/government/publications/the-terrorism-protection-of-premises-act-2025/terrorism-protection-of-premises-act-2025-statutory-guidance) | Yes | Standard |
| [Indoor community centre or sports hall within a park, 200–799 expected](https://www.gov.uk/government/publications/the-terrorism-protection-of-premises-act-2025/terrorism-protection-of-premises-act-2025-statutory-guidance) | Yes | Standard |
| [Indoor facility or controlled-access venue, 800+ expected](https://www.gov.uk/government/publications/the-terrorism-protection-of-premises-act-2025/terrorism-protection-of-premises-act-2025-statutory-guidance) | Yes | Enhanced |
| [Ticketed festival or concert held in an open park, 800+ expected with entry controls](https://protectuk.police.uk/martyns-law/martyns-law-frequently-asked-questions) | Yes (qualifying event) | Enhanced |
| [Free, open-access event with no entry checks](https://protectuk.police.uk/martyns-law/martyns-law-frequently-asked-questions) | No | N/A |

## When Events In Parks Fall Within Scope

Qualifying events held in an otherwise exempt park can still trigger Martyn’s Law duties. [Under the Act, a qualifying event exists when all of the following criteria are met](https://protectuk.police.uk/martyns-law/martyns-law-frequently-asked-questions):

- The event takes place at premises not already in the enhanced tier.
- It is reasonable to expect 800 or more people, including staff, to be present at the same time at some point during the event.
- Access to the event is controlled through tickets, wristbands, paid entry, passes, or guest lists.

[A free, open-access community fun day in the park, even with several thousand attendees, does not qualify because there are no entry controls.](https://protectuk.police.uk/martyns-law/martyns-law-frequently-asked-questions) A ticketed music festival with 5,000 attendees, a fenced Christmas market with 900 visitors, or a paid food and drink festival with 1,200 guests all sit within scope.

[There is no “standard tier event” category under Martyn’s Law; all qualifying events fall within the enhanced tier.](https://data-firstoption.group/martyns-law) A venue that usually operates in the standard tier can still host a qualifying event that triggers enhanced-tier requirements for the duration of that event.

## Compliance Tiers For Recreation Grounds And Indoor Facilities

Martyn’s Law sets out two compliance tiers. [The tier depends on the greatest number of individuals, including staff, reasonably expected to be present at the same time.](https://dutyroom.com/uk/martyns-law/sports-grounds)

| Tier | Capacity Threshold | Key Requirements |
| --- | --- | --- |
| **[Standard](https://www.gov.uk/government/publications/the-terrorism-protection-of-premises-act-2025/terrorism-protection-of-premises-act-2025-statutory-guidance)** | 200–799 people | Notify the SIA, establish public protection procedures covering evacuation, invacuation, lockdown, and communication, and ensure staff understand and can carry out these procedures. |
| **[Enhanced](https://www.gov.uk/government/publications/the-terrorism-protection-of-premises-act-2025/terrorism-protection-of-premises-act-2025-statutory-guidance)** | 800+ people (premises or qualifying events) | Meet all standard tier requirements and implement public protection measures covering monitoring, movement, physical safety and security, and security of information. Designate a senior individual and provide documented compliance information to the SIA. |

[The Act is outcomes-based and proportionate, with “reasonably practicable” defined by balancing objectives against cost, time, and difficulty.](https://www.gov.uk/government/publications/the-terrorism-protection-of-premises-act-2025/terrorism-protection-of-premises-act-2025-statutory-guidance) The standard is proportionate: a small volunteer-run community centre faces lighter expectations than a large leisure complex with professional security teams.

Standard-tier duty does not require expensive physical security features or external consultants. For most indoor parks facilities, the priority lies in clear, documented procedures and staff who know how to act. With that foundation in mind, the next section offers a practical checklist to guide your preparation.

## Steps To Prepare: Practical Martyn’s Law Checklist For Parks

The implementation window, running until at least spring 2027, gives parks teams time to prepare in a structured way. Use this checklist to build a clear, repeatable process.

1. **Audit Your Facilities And Events**

- Start by cataloguing every asset that could fall within scope.
- Identify all indoor facilities, such as community centres, sports halls, pavilions, and changing rooms, with a reasonable capacity of 200 or more.
- Identify all controlled-entry events with an expected capacity of 800 or more, including those organised by third parties on your land.
- [Use a documented “reasonable expectation” methodology supported by evidence, including fire safety occupancy figures, historic attendance data, and ticketing records.](https://professionalsecurity.co.uk/news/interviews/clarity-on-martyns-law-compliance)
2. **Confirm The Responsible Person**

- Assign a named individual for each in-scope premises.
- [For events, confirm whether the council or the third-party organiser controls the premises for the event and record this in licensing agreements.](https://protectuk.police.uk/martyns-law/martyns-law-frequently-asked-questions)
3. **Create Public Protection Procedures**

- Set out clear procedures for evacuation, invacuation (sheltering in place), lockdown, and communication.
- Tailor procedures to the specific premises or event and to the resources realistically available.
4. **Apply Public Protection Measures For Enhanced Tier**

- [For enhanced tier premises and qualifying events, consider and implement appropriate measures covering monitoring, movement, physical safety and security, and security of information.](https://www.gov.uk/government/publications/the-terrorism-protection-of-premises-act-2025/terrorism-protection-of-premises-act-2025-statutory-guidance)
- Examples include CCTV, bag search policies, and vehicle access controls where these are proportionate.
5. **Train Staff And Volunteers**

- [Ensure staff with public protection responsibilities understand the procedures, their roles, and the tools they will use.](https://protectuk.police.uk/martyns-law/martyns-law-frequently-asked-questions)
- Keep dated records of briefings and training sessions.
6. **Keep Live Compliance Records**

- Maintain records of capacity assessments, procedures, and training in a central, accessible location.
- [For enhanced tier premises and qualifying events, provide updated compliance documentation to the SIA within 30 days of any revision.](https://protectuk.police.uk/martyns-law/martyns-law-frequently-asked-questions)
7. **Notify The SIA**

- [For qualifying premises, use the 3-month window from commencement to submit a notification, then report changes within 28 days.](https://www.gov.uk/government/news/martyns-law-keeping-up-the-momentum)
- [For qualifying events, the responsible person usually needs to notify the SIA within 14 days of the event date becoming public.](https://www.gov.uk/government/news/martyns-law-keeping-up-the-momentum)

OnePlan supports steps 1, 3, and 6 directly by turning your audit and procedures into visual, reusable assets. The platform lets you create accurate, to-scale site plans for facilities and events, map evacuation routes, identify lockdown points, calculate standing crowd capacities, and maintain a single source of truth for compliance documentation that every stakeholder can access.

![Festival planning example inside OnePlan: the base layer is a zoomable satellite or street map, and everything placed on it (tents, stages, crowd barriers, toilets, vehicles, staff, signage, routes) stays accurately to scale as you zoom](https://cdn.aigrowthmarketer.co/1780620510054-c5429587ebad.png)**Festival planning example inside OnePlan: the base layer is a zoomable satellite or street map, and everything placed on it (tents, stages, crowd barriers, toilets, vehicles, staff, signage, routes) stays accurately to scale as you zoom**

[**Get started free at OnePlan, where your first event is on us, or book a 15-minute demo to see OnePlan in action.**](https://www.oneplan.io/book-demo/?utm_term=martyns-law-parks-and-rec&utm_campaign=ai_growth_agent)

## Working With Third-Party Event Organisers On Council Land

Third-party organisers usually act as the responsible person when they run a controlled-entry event on council land. [For example, a company renting a local authority park for a concert becomes the responsible person for that qualifying event, unless the authority retains control.](https://protectuk.police.uk/martyns-law/martyns-law-frequently-asked-questions)

Parks and recreation departments still shape how safely these events operate.

**Require Evidence Of Compliance.** Licensing or leasing agreements should require event organisers to confirm their Martyn’s Law status and share evidence of their compliance procedures. [The statutory guidance highlights the need for coordination in complex environments where multiple responsible persons share control, such as parks teams, councils, and outside organisers, so that responses align in shared spaces like entrances, exits, and the public realm.](https://professionalsecurity.co.uk/news/interviews/clarity-on-martyns-law-compliance)

**Use Shared, To-Scale Site Plans.** Effective Martyn’s Law compliance relies on accurate site planning. Requiring organisers to submit detailed, to-scale site plans showing entry and exit points, crowd areas, emergency routes, and security measures creates a clear, auditable record. OnePlan lets council teams, organisers, and emergency services collaborate on a single live plan, which reduces version control issues and keeps everyone working from the same accurate map.

![Workforce planning example inside OnePlan: the base layer is a zoomable satellite or street map, and everything placed on it (tents, stages, crowd barriers, toilets, vehicles, staff, signage, routes) stays accurately to scale as you zoom](https://cdn.aigrowthmarketer.co/1780620462793-34a56c1c38c8.png)**Workforce planning example inside OnePlan: the base layer is a zoomable satellite or street map, and everything placed on it (tents, stages, crowd barriers, toilets, vehicles, staff, signage, routes) stays accurately to scale as you zoom**

**Build Compliance Requirements Into Agreements.** Contractual allocation of compliance risk cannot transfer statutory responsibility from the responsible person, yet contracts can allocate operational responsibilities as a risk-management tool. Require evidence of compliance before issuing permits.

## How OnePlan Supports Martyn’s Law Compliance For Parks Teams

OnePlan gives parks and recreation departments a visual, to-scale way to plan sites and venues that aligns with Martyn’s Law duties. Each capability links directly to the steps outlined above.

- **Create Accurate, To-Scale Site Plans.** The audit step above requires you to map every facility and event. OnePlan’s drag-and-drop interface lets you place infrastructure, identify evacuation routes, and map security measures. All of this happens on a live, geo-accurate map built on leading GIS technology powered by Esri, turning your audit into a reusable compliance asset.
- **Calculate Standing Crowd Capacities.** OnePlan’s crowd capacity calculator lets you outline any area and instantly see its standing capacity. This supports defensible capacity assessments that feed directly into your tier decisions and documentation.
- **Collaborate With Stakeholders In Real Time.** OnePlan provides a single source of truth where council teams, event organisers, and emergency services can work together on one live plan. This shared view is critical when coordinating Martyn’s Law procedures across entrances, exits, and other shared spaces.
- **Export Professional Documentation.** Generate high-resolution maps and Bill of Quantities reports for permits, Safety Advisory Group meetings, and SIA documentation. These exports help you present clear evidence of how you manage public protection.

Local government teams across the UK and beyond already use OnePlan to streamline event planning. [Eagle Mountain City cut planning time by 70%, from 8–10 hours down to a few hours per event, and achieved a 5x return on investment by moving from separate maps for fire, police, and facilities departments to a single, all-encompassing layout in OnePlan.](https://www.oneplan.io/case-studies/how-eagle-mountain-city-saves-70-planning-time-and-achieves-5x-roi-organizing-community-events-using-oneplan/?utm_term=martyns-law-parks-and-rec&utm_campaign=ai_growth_agent) [South Fayette Township’s parks and recreation team made a similar shift, moving from Google Earth to OnePlan for their community events.](https://www.oneplan.io/case-studies/from-google-earth-to-oneplan-south-fayettes-parks-and-recreation-teams-journey-planning-community-events/?utm_term=martyns-law-parks-and-rec&utm_campaign=ai_growth_agent)

![aerial shot of a coast filled with software-added event elements. On the left, there is an app menu (OnePlan)](https://cdn.aigrowthmarketer.co/1780508353774-e6397ee8616e.png)**Beach event planning example inside OnePlan: the base layer is a zoomable satellite or street map, and everything placed on it (tents, stages, crowd barriers, toilets, vehicles, staff, signage, routes) stays accurately to scale as you zoom**

## Common Martyn’s Law Pitfalls For Parks Teams

1. **Assuming All Parks Are Exempt.** The open-access exemption only holds while access stays open and uncontrolled. [Once you add paid entry, tickets, passes, or membership, the site can come into scope as qualifying premises.](https://www.gov.uk/government/publications/the-terrorism-protection-of-premises-act-2025/terrorism-protection-of-premises-act-2025-statutory-guidance) Indoor facilities and controlled-entry events within parks are frequently in scope, so carry out an asset-by-asset audit.
2. **Overlooking Smaller Indoor Facilities.** [Premises where 200–799 people, including staff and volunteers, could reasonably be present at any one time must meet standard tier requirements.](https://museumsassociation.org/museums-journal/news/2026/06/guidance-highlights-implications-of-martyns-law-for-heritage-sites) Small community centres and sports pavilions are easy to miss yet qualify once they can reasonably expect 200 or more people, even only at peak times.
3. **Underestimating Capacity.** Sports organisations cannot rely on low day-to-day attendance to avoid scope, because tournaments or open days may exceed thresholds. The same logic applies to parks facilities, so use a documented, evidence-based methodology.
4. **Failing To Coordinate With Third-Party Organisers.** [Where multiple parties share control, the Act sets explicit duties to co-operate and co-ordinate as far as reasonably practicable.](https://data-firstoption.group/martyns-law) Build Martyn’s Law requirements into licensing agreements and request evidence of compliance before permits are issued.
5. **Treating Documentation As A One-Off Exercise.** Remember the 30-day documentation window mentioned earlier for enhanced tier premises and qualifying events. Treat compliance records as living documents and review them after significant changes to the premises, event, or threat environment.

## Frequently Asked Questions

### Does Martyn’s Law Apply To Public Parks?

Open public parks that remain freely accessible without controlled entry are generally exempt under Schedule 2 of the Act. The exemption applies only to open-access premises with no measures to secure or check that access is restricted. Indoor facilities within parks, such as community centres, sports halls, and pavilions, with a capacity of 200 or more are likely in scope as qualifying premises. Controlled-entry events held within parks with an expected capacity of 800 or more sit in scope as qualifying events, so each asset needs an individual assessment.

### What Is The Capacity Threshold For Events In Parks?

A qualifying event under Martyn’s Law requires 800 or more people, including staff, to be reasonably expected at the same time at some point during the event, with controlled entry such as tickets, wristbands, or paid admission. Free, open-access events without entry checks do not qualify, regardless of attendance. All qualifying events fall within the enhanced tier.

### Who Is The Responsible Person For An Event In A Park?

The responsible person is the individual, organisation, or company that controls the premises for the event. For a third-party organised event, such as a ticketed concert or festival where a promoter leases the park, the organiser usually acts as the responsible person unless the council retains control. If the council organises a ticketed event itself, the council holds responsibility. Parks departments should confirm and document this in every licensing or leasing agreement and require third-party organisers to provide evidence of Martyn’s Law compliance before permits are issued.

### What Is The Difference Between Standard And Enhanced Tier Requirements?

The standard tier applies to indoor premises with a capacity of 200–799. It requires notification to the Security Industry Authority (SIA) and public protection procedures covering evacuation, invacuation, lockdown, and communication. Staff must understand these procedures and be able to carry them out.

The enhanced tier applies to premises with a capacity of 800 or more and to all qualifying events. It adds three requirements: public protection measures covering monitoring, movement, physical safety and security, and security of information, designation of a senior individual responsible for compliance, and documented compliance information provided to the SIA within 30 days of any revision. The Act remains outcomes-based and proportionate, so what counts as “reasonably practicable” will differ between a large leisure complex and a small volunteer-run community centre.

### What Tools Can Help Parks And Recreation Departments Plan For Martyn’s Law?

Accurate, to-scale site plans sit at the heart of effective Martyn’s Law compliance because they underpin evacuation route mapping, capacity assessments, and the documentation required for the SIA and Safety Advisory Group meetings. OnePlan provides a browser-based, drag-and-drop platform where parks and recreation teams can build geo-accurate site plans for any facility or event, calculate standing crowd capacities, and collaborate with council colleagues, organisers, and emergency services on a single live plan. It is free for your first event, which keeps it accessible for departments of any size. You can also use OnePlan’s free arrival and exit calculators to model queue lengths and exit flow for your events, including the [arrival calculator](https://calculators.oneplan.io/arrival?utm_term=martyns-law-parks-and-rec&utm_campaign=ai_growth_agent) and the [exit calculator](https://calculators.oneplan.io/exit/calculator?utm_term=martyns-law-parks-and-rec&utm_campaign=ai_growth_agent).

**Build your event as a team inside OnePlan: design and manage any physical space on one integrated, live plan**

## Start Preparing Today

Martyn’s Law represents a significant shift in how public venues and events approach terrorism protection. For parks and recreation departments, the core message is clear: open parks are generally exempt, while indoor facilities and controlled-entry events within them require careful, asset-by-asset assessment.

The implementation period, running until at least spring 2027, offers a valuable window to prepare. Begin by auditing your assets, deciding which facilities and events fall within scope, and building the procedures and documentation you will rely on. When you need accurate, to-scale site plans to support that work, OnePlan provides a practical way to bring everything together.

*This article is for informational purposes only and does not constitute legal advice. Always refer to the [Home Office statutory guidance](https://www.gov.uk/government/publications/the-terrorism-protection-of-premises-act-2025/terrorism-protection-of-premises-act-2025-statutory-guidance), [ProtectUK resources](https://protectuk.police.uk/martyns-law), and the [Security Industry Authority](https://www.gov.uk/government/organisations/security-industry-authority) for authoritative compliance guidance.*

[**Get started free at OnePlan, where your first event is on us, or book a 15-minute demo to see OnePlan in action.**](https://www.oneplan.io/book-demo/?utm_term=martyns-law-parks-and-rec&utm_campaign=ai_growth_agent)

## Read Next

- [How to Create a Permit-Ready Site Plan for Park Events](https://oneplan.io/articles/parks-recreation-event-site-plan?utm_term=martyns-law-parks-and-rec&utm_campaign=ai_growth_agent)
- [How to Create a Municipal Event Site Plan Template](https://oneplan.io/articles/event-site-plan-template-municipal?utm_term=martyns-law-parks-and-rec&utm_campaign=ai_growth_agent)
- [Municipal Festival Infrastructure: A 4-Phase Ops Playbook](https://oneplan.io/articles/municipal-festival-infrastructure-planning-playbook?utm_term=martyns-law-parks-and-rec&utm_campaign=ai_growth_agent)
- [Municipal Event Planning Software: Ditch the Spreadsheets](https://oneplan.io/articles/municipal-event-planning-software?utm_term=martyns-law-parks-and-rec&utm_campaign=ai_growth_agent)
- [Event Safety Map for City Permit: What to Include](https://oneplan.io/articles/event-safety-map-city-permit?utm_term=martyns-law-parks-and-rec&utm_campaign=ai_growth_agent)

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      - **Text:** A qualifying event under Martyn’s Law requires 800 or more people, including staff, to be reasonably expected at the same time at some point during the event, with controlled entry such as tickets, wristbands, or paid admission. Free, open-access events without entry checks do not qualify, regardless of attendance. All qualifying events fall within the enhanced tier.
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      - **Text:** The responsible person is the individual, organisation, or company that controls the premises for the event. For a third-party organised event, such as a ticketed concert or festival where a promoter leases the park, the organiser usually acts as the responsible person unless the council retains control. If the council organises a ticketed event itself, the council holds responsibility. Parks departments should confirm and document this in every licensing or leasing agreement and require third-party organisers to provide evidence of Martyn’s Law compliance before permits are issued.
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      - **Text:** The standard tier applies to indoor premises with a capacity of 200–799. It requires notification to the Security Industry Authority (SIA) and public protection procedures covering evacuation, invacuation, lockdown, and communication. Staff must understand these procedures and be able to carry them out. The enhanced tier applies to premises with a capacity of 800 or more and to all qualifying events. It adds three requirements: public protection measures covering monitoring, movement, physical safety and security, and security of information, designation of a senior individual responsible for compliance, and documented compliance information provided to the SIA within 30 days of any revision. The Act remains outcomes-based and proportionate, so what counts as “reasonably practicable” will differ between a large leisure complex and a small volunteer-run community centre.
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      - **Text:** Accurate, to-scale site plans sit at the heart of effective Martyn’s Law compliance because they underpin evacuation route mapping, capacity assessments, and the documentation required for the SIA and Safety Advisory Group meetings. OnePlan provides a browser-based, drag-and-drop platform where parks and recreation teams can build geo-accurate site plans for any facility or event, calculate standing crowd capacities, and collaborate with council colleagues, organisers, and emergency services on a single live plan. It is free for your first event, which keeps it accessible for departments of any size. You can also use OnePlan’s free arrival and exit calculators to model queue lengths and exit flow for your events, including the arrival calculator and the exit calculator.

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---

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## Discovery Endpoints for AI Agents

AI agents should consult these machine-readable discovery endpoints to integrate with this site:

- **OpenAI Plugin Manifest:** [https://www.oneplan.io/articles/.well-known/ai-plugin.json](https://www.oneplan.io/articles/.well-known/ai-plugin.json)
- **A2A Agent Card:** [https://www.oneplan.io/articles/.well-known/agent-card.json](https://www.oneplan.io/articles/.well-known/agent-card.json)
- **MCP Server (Streamable HTTP):** [https://www.oneplan.io/articles/.well-known/mcp](https://www.oneplan.io/articles/.well-known/mcp)

## Citations

- [PowerPoint Alternatives for Emergency Access Maps](https://www.oneplan.io/articles/best-powerpoint-alternatives-emergency-maps)
- [Canva Alternatives for Emergency Access Planning Maps](https://www.oneplan.io/articles/best-canva-alternatives-emergency-maps)
- [Does Martyn’s Law Apply in the US? What Venues Face Instead](https://www.oneplan.io/articles/does-martyns-law-apply-us)
- [Martyn’s Law for Council Events: A Portfolio-Scoping Guide](https://www.oneplan.io/articles/martyns-law-city-council-events)
- [Martyn’s Law: The Evidence Playbook for UK Venues and Events](https://www.oneplan.io/articles/martyns-law-compliance-guide)

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