An interim possession order (IPO) is a type of order available only against trespassers, making it a criminal offence to fail within 24 hours to leave the relevant property (section 76 of the Criminal Justice and Public Order Act 1994 (CJPOA 1994)). This includes a person who leaves and re-enters (CJPOA 1994, s 76(4)). Applications are governed procedurally by CPR 55.21–28. By CPR 55.21, IPOs are available only in respect of premises, as opposed to land, can only be used where a landlord brings proceedings within 28 days of knowing, or from when they ought to have known, that the trespassers are in occupation, and the trespassers must have entered without permission from the landlord (so not, for example,