Try Rule 35 of the Rules of the Air Regulations for a start
An aircraft shall not taxi on the apron or the manoeuvring area of an aerodrome without the permission of the person in charge of the aerodrome or, where the aerodrome has an air traffic control unit or an aerodrome flight information service unit for the time being notified as being on watch, without the permission of that unit.
The definition of an aerodrome being "Any area of land or water designed, equipped, set apart or commonly used for affording facilities for the landing and departure of aircraft and includes any area or space, whether on the ground, on the roof of a building or elsewhere, which is designed, equipped or set apart for affording facilities for the landing and departure of aircraft capable of descending or climbing vertically, but shall not include any area the use of which for affording facilities for the landing and departure of aircraft has been abandoned and has not been resumed."
Whilst this does not specifically prevent an aircraft from landing at an aerodrome without permission, it is difficult to see what, apart from a touch-and-go, you could do after landing that would not involve taxying on the 'apron or maneouvring area'