Why Zone Ex, The Grey Space Matters: Managing Safety and Security Beyond the Event Perimeter

When event organisers think about safety management, attention is often focused on what happens inside the venue boundary. Whether it is a festival, stadium, arena, fan zone or outdoor event, considerable effort is invested in crowd management, stewarding, emergency planning and operational control within the licensed or controlled area. However, some of the most significant risks to public safety exist outside the event footprint, in the area commonly referred to as "Zone Ex" or the "grey space".

Zone Ex encompasses the public realm beyond the formal event boundary. It includes surrounding highways, transport hubs, pedestrian routes, public open spaces, car parks, drop off and pick up points, nearby businesses and other areas where attendees gather before entering and after leaving an event. While organisers may not have direct control over these locations, the public rarely distinguishes between the event itself and the surrounding environment. If an incident occurs on the approach to a venue, public perception is often that it is connected to the event regardless of who owns or manages the land.

The importance of managing Zone Ex is recognised within industry guidance. The Purple Guide highlights the need for event organisers to consider the impact of events beyond the immediate site boundary and to work collaboratively with local authorities, transport providers, emergency services and other stakeholders to manage risks associated with ingress, egress and crowd movement. Similarly, the Guide to Safety at Sports Grounds, commonly known as the Green Guide, emphasises the need to consider the wider circulation system around a venue, recognising that safe spectator movement extends beyond the turnstiles and perimeter fences.

Crowd safety risks in Zone Ex can be complex and dynamic. Large numbers of people may converge on transport interchanges, footways and road crossings simultaneously. Congestion can develop rapidly, particularly where pedestrian routes narrow, intersect with vehicle traffic or encounter physical constraints. The risk is not limited to discomfort or delay. Excessive crowd density can lead to crushing, trips and falls, restricted emergency access and, in extreme circumstances, crowd collapse.

These risks cannot be managed by event organisers alone. Effective Zone Ex management relies upon genuine partnership working between all relevant stakeholders. Local authorities, police services, highway authorities, transport operators, emergency services, venue operators, event organisers, security providers and local businesses all have a role to play. Each organisation possesses different powers, responsibilities and information that contribute to a comprehensive understanding of the operating environment.

The management of public highways is a particularly important consideration. Under the provisions of the Highways Act 1980, highway authorities have statutory responsibilities relating to the maintenance and management of public roads and footways. Event organisers cannot simply assume control of public highways without appropriate permissions and legal processes. Where events require temporary road closures, restrictions on vehicle movements or changes to traffic arrangements, legal mechanisms such as Temporary Traffic Regulation Orders and Temporary Traffic Restriction Orders may be required, depending on the circumstances and the relevant authority involved. These orders provide a lawful framework for managing traffic and pedestrian movement while helping to maintain public safety.

The relationship between crowd safety and traffic management is often underestimated. A well managed venue can still experience significant safety issues if surrounding roads become congested or if pedestrian routes are not adequately protected from vehicle movements. Effective planning requires detailed modelling of arrival and departure patterns, assessment of transport capacity and coordination between traffic management providers, police and highway authorities. This becomes particularly important at events attracting large attendances or those located in urban environments where competing demands already exist on the transport network.

Security considerations are equally important within Zone Ex. The current threat environment requires organisers to think beyond traditional crowd safety hazards and consider the potential for hostile acts targeting crowded places. National guidance increasingly promotes a protective security approach that examines vulnerabilities throughout the entire visitor journey rather than focusing solely on the venue itself.

This is where competent counter terrorism advice becomes essential. Counter terrorism security measures should be developed and reviewed by appropriately trained and competent persons who understand threat assessment, hostile vehicle mitigation, behavioural detection, protective security principles and emergency response arrangements. The effectiveness of security measures often depends on their integration with wider crowd management plans. Security interventions that impede pedestrian flow or create bottlenecks can inadvertently introduce crowd safety risks if they are not carefully designed and coordinated.

The ongoing development of what is commonly known as Martin's Law has further highlighted the importance of considering security beyond the venue perimeter. At the time of writing, certain practical details relating to implementation, regulatory oversight and operational expectations continue to develop and may be subject to further clarification. However, the legislation is intended to strengthen preparedness and protective security arrangements at publicly accessible locations. Regardless of the final operational requirements, the principles underpinning Martin's Law reinforce the need for organisations to understand threats, assess vulnerabilities and work collaboratively to reduce risk across the entire event environment rather than solely within the event footprint.

A common mistake is to view Zone Ex as someone else's responsibility. In reality, successful event delivery depends upon a shared understanding of risk and a collective commitment to mitigation. While legal responsibilities may differ between organisations, effective safety management requires a coordinated approach. Information sharing, joint planning meetings, multi agency exercises and integrated command structures all contribute to a more resilient operation.

Events are increasingly judged not simply on what happens inside the venue but on the overall attendee experience from arrival to departure. Safe pedestrian routes, effective transport management, visible security measures, clear wayfinding and coordinated emergency arrangements all influence public confidence and safety outcomes. The journey begins long before attendees reach the entrance gate and continues long after they leave.

For event organisers, the message is clear. Zone Ex is not an optional consideration or a peripheral issue. It is a critical component of modern event safety and security management. The organisations that consistently deliver safe and successful events are those that recognise that crowd safety does not stop at the fence line. By working in partnership with all stakeholders and adopting a whole journey approach, organisers can create safer environments, improve resilience and better protect the people who attend their events.

References

The Purple Guide. Event Industry Forum. The Purple Guide to Health, Safety and Welfare at Music and Other Events.

Guide to Safety at Sports Grounds. UK Department for Culture, Media and Sport. Guide to Safety at Sports Grounds (Green Guide), 6th Edition.

Highways Act 1980.

Road Traffic Regulation Act 1984.

Terrorism (Protection of Premises) Act 2025.

National Protective Security Authority (NPSA). Guidance on Crowded Places and Protective Security.

National Counter Terrorism Security Office (NaCTSO). Guidance for Crowded Places and Event Security