You can display green ‘probationary’ P plates to show that you’ve just passed your driving test. You don’t have to display them. You can leave them on your vehicle for as long as you like. In Northern Ireland you must use ‘R’ plates (restricted driver plates) for one year after you pass your test.
L-plates. Don’t forget the L plates! Not only is it illegal to allow a learner behind the wheel without them displayed, but it will also help other drivers. … The Highway Code states that plates should be removed or covered while a learner isn’t driving, so remove them after every lesson