New Section 11C of the Anti-social Behaviour Act 2003: Part 1A closure order: enforcement
659.When a Part 1A closure order is made, a constable (or a person authorised by the chief officer of police) in respect of orders applied for by a constable or a person authorised by the local authority in respect of orders applied for by that authority may enter the premises and secure it against entry by any other person, using reasonable force if necessary. The same authorised persons may also enter the premises at any time to carry out essential maintenance or repairs.