Equestrian events: what horse shows and venues should know about Martyn's Law

The equestrian press has started highlighting Martyn's Law to the horse world. The law, formally the Terrorism (Protection of Premises) Act 2025, received Royal Assent in April 2025. It sets out duties for premises and events that attract larger numbers of people. The duties are not yet in force. Commencement is expected in spring 2027, and the exact date is still to be confirmed.

Big shows, competitions and showgrounds can draw substantial crowds. The law uses attendance thresholds that include staff as well as the public. Premises or events where 200 to 799 people may reasonably be expected at the same time fall into the standard tier. Those expecting 800 or more fall into the enhanced tier. That means many equestrian gatherings could be in scope, even if the venue is mostly open fields rather than a permanent building.

The Security Industry Authority (SIA) will be the regulator for Martyn's Law. Its notification process is not yet live, so there is nothing to register at this stage. The sensible step now is to understand roughly how many people you expect and which tier that might place you in.

Start by estimating your busiest expected attendance, counting staff, stewards and the public together. Think about who is responsible for your event or site and how you would coordinate basic preparation. There is no action required by law today, so avoid any sense of panic. Use the time before commencement to familiarise yourself and get organised.