If you are interested in personalised registration numbers, you may find these links useful:
DVLA Personalised Registrations Website
DVLA Personalised Registrations Auction Home Page
Prices Achieved at Most Recent DVLA Live Auction
Prices Achieved at Most Recent DVLA Timed Auction
Search Facility for Prices Achieved at All DVLA Auctions Since 1989
It is an offence to alter, re-arrange, or misrepresent a registration number. There is a maximium fine of £1000, and the registration number can be withdrawn without compensation.