Identifying plates fitted to vehicles in the UK (and elsewhere), carrying the vehicle's registration number.
Similar to License plate, Registration plate etc.
In the UK
the reg. no. belongs to the vehicle, not the driver, and contains information about the age of the vehicle and the region in which it was first sold. The system is administered by the
DVLA.
The reg. number is alphanumeric, and takes the form AB12
CDE on vehicles registered after 2001, or
A123 BCD on vehicles registered before 2001.