What Martyn's Law Preparation Looks Like for Shops and Retail Spaces

Law firm commentary published through Mondaq has turned its attention to the retail sector, discussing how Martyn's Law — the everyday name for the Terrorism (Protection of Premises) Act 2025 — is likely to affect shops, stores and shopping spaces. It is a reminder that the Act reaches well beyond pubs, halls and event venues. Any premises where enough people may gather could fall within scope.

The Act sorts qualifying premises into two tiers based on how many people may reasonably be expected at the same time, staff included. Standard tier covers 200 to 799 people. Enhanced tier covers 800 or more. A busy store, a large supermarket or a shopping area could meet these numbers at peak times, so it is worth thinking about your realistic maximum occupancy.

The duties are not in force yet. Commencement is expected in spring 2027, and the exact date has not been confirmed. The regulator will be the Security Industry Authority, and its notification process is not live yet. So there is nothing to register or submit today. The point of coverage like this is to help the retail sector get familiar with the direction of travel in good time.

Estimate how many people — customers and staff — could be on your premises at once, so you know which tier you are likely to fall into. Start informal conversations with your team about how they would respond in an emergency. Keep an eye on official SIA and Home Office updates as the rules are finalised. Treat this as early preparation, not a legal requirement to act today.