After learners in Great Britain pass their driving test, they may opt to display green P-plates (for probationary) to show their lack of experience; this is entirely voluntary however. Some new drivers use green L plates (the pre-test colour being red), however P-plates are more common.
 
L plates are required to be displayed at all times whilst riding a motorcycle or moped of no more than 125 cc (7.6 cu in) after passing motorcycle compulsory basic training (CBT). This sub-licence allows the holder to ride any motorcycle up to 125 cc without a full and proper licence, therefore it is mainly used by younger motorists (16-19) who are legally allowed to ride motorcycles up to 125 cc but cannot afford to buy full lessons to gain a restricted licence (enabling the holder to travel on motorways and carry pillion passengers but only able to ride motorbikes over 33 hp (25 kW) after 2 years). Riders over 21 may opt to train for a full licence therefore a CBT is just a 'stepping stone' to this.
 
In Northern Ireland for one year after the passing of a driving test, the driver is defined as a "restricted driver" who must not exceed 45 mph and must display an "R-plate" consisting of an red sans-serif R on a white background. L-plates in Northern Ireland commonly have an R-plate as a reverse side. "R-plate" drivers are often viewed as a nuisance on motorways, due to their limited speed, resulting in many restricted drivers not displaying their "R-plates" or not keeping to the restricted speed limit.[7][8]
 
In Wales either red L plates or red D plates are permitted, due to the bilingual legislation in force within the country, while a learner is driving the car, motorcycle or moped.