Every sports ground with a capacity of 200 or more is in scope for Martyn's Law. Most professional grounds will be Enhanced Tier.
The Terrorism (Protection of Premises) Act 2025 received Royal Assent in April 2025. Sports grounds and stadiums across the UK are required to comply before April 2027. For most professional venues, that means Enhanced Tier obligations.
Two months free. No hardware. No commitment beyond the conversation.
01 / Which Tier
Non-league and lower division grounds may sit in Standard Tier. Premier League, EFL and major venues are almost all Enhanced.
Any sports ground with a qualifying capacity of 200 to 799 falls into the Standard Tier. This includes smaller non-league football grounds, local athletics facilities, county cricket grounds with limited seating and regional rugby clubs. Standard Tier venues must put documented security procedures in place and register with the Security Industry Authority.
Venues with a qualifying capacity of 800 or above fall into the Enhanced Tier. For professional sports, this is the default. Premier League and Championship football grounds, Premiership rugby venues, county cricket grounds with full stands, and any stadium that hosts events beyond the sport itself are Enhanced Tier. The NEC, Wembley, Twickenham and every major arena used for concerts on top of sport are clear examples.
Enhanced Tier venues face obligations that go well beyond procedures. Physical protective measures must be in place and demonstrable. A documented detection log is part of what the SIA will assess.
- Written evacuation and lockdown procedures
- Staff terrorism threat awareness training
- Communication protocols for an attack scenario
- SIA registration
- All Standard Tier obligations
- Documented vulnerability assessment
- Designated responsible person
- Active physical protective measures
- Demonstrable monitoring capability for SIA assessment
02 / What Measures
Sports grounds have the most complex crowd management challenge of any venue type. Passive CCTV is not enough.
A stadium on match day is the most demanding venue environment for any security system. Tens of thousands of people arrive and depart in a concentrated time window. Multiple entry points operate simultaneously. Opposing supporter groups are managed through separated access routes. Concourse areas fill and empty rapidly between periods of play.
Most professional grounds already have extensive IP camera infrastructure covering perimeter, concourse, terrace and pitch areas. The question the Act asks is not whether you have cameras. It is whether those cameras are doing active safety work or simply recording.
For Enhanced Tier grounds, the answer must be active monitoring. AI behaviour detection running on your existing camera network provides the proportionate physical measure the law requires. It detects crowd anomalies, perimeter breaches, loitering at access points and unusual behaviour in concourse areas. Every detection is logged. That log is what the SIA wants to see.
The arrival window is your highest-risk period.
The 90-minute pre-match period concentrates the largest unstructured crowd movement of match day. Detection during that window is where AI monitoring provides the most operational value.
Perimeter and access point detection is specifically what the Act addresses.
The behavioural patterns most associated with pre-attack activity at large venues include loitering near entry points, unusual perimeter approach behaviour and individuals moving against the crowd flow. These are exactly the patterns Archangel is built to detect.
No new hardware required.
Most professional grounds have comprehensive IP camera coverage. Archangel adds an active detection layer without replacing that infrastructure. The compliance route does not require a capital project.
03 / How AI Behaviour Detection Helps
What Archangel detects in a sports ground or stadium environment.
Perimeter loitering and approach anomalies
Pre-attack reconnaissance at large venues often involves extended time near perimeter gates and turnstiles. Detection flags individuals whose behaviour deviates from normal pre-match crowd patterns.
Crowd surge and anomaly detection
Unusual crowd movement in concourse areas, on approach routes or near entry points is detected and flagged before it escalates into a crush or incident.
Unattended items in public areas
Bags or objects left in concourses, seating areas or near entry points are flagged in real time, giving staff time to assess before the surrounding area is affected.
Tailgating through staff access
Stadium service corridors and media areas have controlled access. Detection alerts security when someone follows a member of staff through a restricted access point.
Aggression and physical altercation detection
Fight detection in concourse and seating areas alerts stewards to the exact camera view and location so response time is reduced significantly.
Documented detection log for SIA
Every alert, confirmed detection and steward response is logged automatically. That documentation is what the SIA assesses when reviewing Enhanced Tier compliance.
For the full guide to Martyn's Law, including detailed tier obligations and the implementation timeline, visit our main guide.
Read the full Martyn's Law guideUnderstand what Martyn's Law means for your ground.
Book a discovery call. We will assess your venue tier, your existing camera infrastructure, and what active AI monitoring looks like for a stadium environment. Two months free means you can start before enforcement begins.
Two months free. No hardware. No commitment beyond the conversation.