Answer four quick questions to see whether your premises and events are likely to be in scope of the Terrorism (Protection of Premises) Act 2025, which tier applies and what the law asks of you.
Based on sections 2 and 3 and Schedules 1 and 2 of the Act. Nothing you enter leaves your browser.
Pick the main use. These are the uses listed in Schedule 1 of the Act.
Count staff, volunteers and contractors as well as visitors. Use what could reasonably happen from time to time, not a typical day.
The Act sets two tiers for premises, plus a set of duties for large ticketed events. Here is what each one asks.
| Standard tier | Enhanced tier | Qualifying events | |
|---|---|---|---|
| Who | Premises where 200 to 799 people may be present at the same time. Places of worship, childcare, schools and further education are always standard tier. | Premises where 800 or more people may be present at the same time | Events for 800 or more people with ticket, payment or membership checks, at premises that are not enhanced tier |
| Notify the SIA | Yes | Yes | Yes |
| Public protection procedures | Evacuation, invacuation, lockdown and communication, with staff who know their role | Yes | Yes |
| Public protection measures | No | Monitoring, movement of people, physical security and security of information | Yes |
| Document for the SIA | No | Kept up to date and sent to the SIA | Yes |
| Designated senior individual | No | Where the responsible person is an organisation | Yes |
| Maximum penalty | £10,000, plus up to £500 a day | £18 million or 5% of qualifying worldwide revenue, plus up to £50,000 a day | As enhanced tier |
Sources: section 2, section 3, sections 5 to 10 and sections 18 and 19 of the Act on legislation.gov.uk.
Premises are in scope when three things are true: they include a building, they are wholly or mainly used for one of the uses below, and it is reasonable to expect 200 or more people may be there at the same time from time to time.
The person responsible is whoever has control of the premises for that main use. Where control is shared, each person is responsible and must co-ordinate with the others.
Some premises are excluded: those used by Parliament and the devolved governments, parks and recreation grounds with free, open public access, and sites covered by an aerodrome, rail, Channel Tunnel or port security plan.
Yes. The test is how many individuals it is reasonable to expect may be present at the same time, from time to time, in connection with the use of the premises. Staff, volunteers and contractors count as well as visitors, so a venue for 780 guests with 60 staff on a busy night is over 800.
The premises are standard tier. The event is a qualifying event in its own right if 800 or more people may be there at the same time, members of the public attend and there are ticket, payment or membership checks. Qualifying events carry the same extra duties as enhanced tier premises. Events at places of worship, childcare settings, schools and further education premises are excluded.
No. Where the main use is a place of worship, childcare, a primary or secondary school or further education, the premises are standard tier however many people may be present, and events held there are not qualifying events.
The person who has control of the premises in connection with their main Schedule 1 use. For some premises the Act names the responsible body, such as the NHS trust for a hospital or the governing body of a school or university. Where control is shared, each person is responsible and must co-ordinate with the others, and anyone else with control of enhanced premises or an event must co-operate.
The SIA, or anyone with control of the premises or event, can ask the tribunal to decide whether premises are in scope, whether they are enhanced tier, their main use, whether an event qualifies and who is responsible.
The Act became law on 3 April 2025. The SIA expects the duties on premises and events to come into force in spring 2027 and will confirm the date in advance. Premises in scope will then have three months to notify the SIA.
There is no statutory training duty in the Act. The statutory guidance says staff with a role in your public protection procedures must be made aware of them and their role, and that without training it is likely to be difficult to show your procedures are appropriate. At the enhanced tier, training needs and evidence of training should be documented.
Sources: the Terrorism (Protection of Premises) Act 2025, the Home Office statutory guidance and the SIA's guidance on its role as regulator. Checked 14 October 2026. This page is general information, not legal advice.
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