Everything you need to understand Martyn's Law

Capacity decides whether the Act applies to you at all. Here are the six ways the Home Office accepts for evidencing it, and who you have to include in the count.

The duties apply per premises, not per organisation. What that means for dioceses, academy trusts, leisure groups and hall networks managing compliance across a portfolio.

Churches, mosques, synagogues and temples are always standard tier, whatever their capacity. What that means in practice for a building that is open to everyone.

Educational premises are always standard tier. What the Act adds to the lockdown planning schools already do, and who carries the duty in a trust or federation.

Community halls are one of the most common standard tier premises. Capacity counting, hire bookings, trustee duties, and what the Act asks of a building run by volunteers.

Written procedures only count if your people know them. What the awareness duty asks for, whether volunteers are included, and how to evidence it without a training budget.

Most venues are standard tier, and the duties are much lighter than people expect. Here is what separates the two tiers and what each one actually asks you to do.

Section 5 asks for four written procedures. Here is what each one means in plain English, and what a good one looks like for a small venue rather than an arena.

A plain-English explanation of the Terrorism (Protection of Premises) Act 2025 — who it covers, what it asks for, and what to do before enforcement begins in spring 2027.

The Act puts its duties on a responsible person for each premises. How to work out who that is, what happens in shared or hired buildings, and how to notify the SIA.