Suffix style registrations have a year identifier as the last letter. They run from A to Y and were issued to GB registered vehicles from 1963-1983. An example of a 1963 suffix registration would be WRT 123A and a 1983 plate would be JWU 123Y. You can make some fantastic combinations from them, as the numbers can be single to three digits for example: GOL 1F, PET 3R, SAR 4H, ANG 31A etc. You can assign suffix number plates to modern vehicles to make them look older.