Can't really escape that one here: 217. Probationary drivers must have "P" plates (1) A probationary driver must not drive a motor vehicle (other than a tractor) on a highway unless a "P" plate is conspicuously displayed— (a) in the case of a motor cycle or motor trike, facing out from the rear of the motor cycle or motor trike; or (b) in any other case, facing out from the front and rear of the motor vehicle. And for those who like to cut or modify them to blend in with your other pretty stickers: "P plate" means— (a) in relation to a probationary driver who is the holder of a probationary driver licence, a plate measuring approximately 150 millimetres by 150 millimetres that has a white letter "P" clearly marked on a red background; So if you have anything other than that it's not a 'P' plate and the offence is 'Fail to Display P Plates'. The argument has also come up on other forums about police members who are on a 'P' licence and do they have to wear the plates when they are working? Here's your answer: (3) Sub-regulation (1) does not apply to a person who is— (a) a member of the police force who, in the course of duty, is driving a motor vehicle; I love the law.