Well locking it is certainly interfering with the use of the property. Much as someone could interfere with use a car by locking something to it rendering it i

Well locking it is certainly interfering with the use of the property. Much as someone could interfere with use a car by locking something to it rendering it immobile, perhaps. If locking the boot to it isn't a crime under the very same law, unlocking it surely also isn't. I do agree that the law is whatever a lawyer can successfully argue; I bet there are lawyers who can successfully argue that unlocking the boot isn't criminal trespass.