New GOV.UK Note Explains How to Classify Premises With More Than One Use
Published
The Home Office has published guidance on working out the "principal use" of a building when it serves two or more purposes under Martyn's Law. It helps mixed-use venues decide which rules apply.
What happened
GOV.UK has released a guidance note on determining the principal use of premises. It covers situations where a single site is used for two or more of the activities listed in Schedule 1 to the Terrorism (Protection of Premises) Act 2025. The note explains how to identify the main use when several apply at once.
Why this matters for venues
Many places do more than one thing. A church hall might host worship, a playgroup and a weekend market. A pub might serve drinks downstairs and run function rooms upstairs. The Act's scope depends on how your premises are used and how many people may be present. Knowing which use counts as the principal one helps you understand where your site sits.
A reminder on the timing
The duties under Martyn's Law are not yet in force. Commencement is expected in spring 2027, and the exact date has not been confirmed. This guidance is there to help you prepare and understand the framework, not something you must act on today.
What to do now
If your venue has more than one use, it is worth reading the note to see how the principal use is assessed. Think about your typical activities and how many people, including staff, may reasonably be present at the same time. This is familiarisation and preparation, not a formal step, and it is not a substitute for professional advice on your own situation.
This is our plain-English summary. Read the original in full at GOV.UK.