You may want to take a registration number off your vehicle to either transfer it onto another vehicle or if you want to keep it to use again in the future.
In order to take a registration number off a vehicle you will need to contact the DVLA either online or by post. It will cost £80 for 10 years and you can renew for a further 10 years.
Before a registration number can be taken off a vehicle you will need the 11 digit reference number that can be found on the latest V5C registration certificate.
The vehicle must be registered with the DVLA in the UK, be available for inspection and able to move under it's own power, be a vehicle that requires an MOT or HGV test certificate. It also needs to have been taxed or have a valid SORN (Statutory Off Road Notification) continuously for the last 5 years. If your vehicle has had a SORN for longer than 5 years it will need to be taxed and possibly inspected.
Note: You will not be able to keep a registration number if it starts with a 'Q' or 'NIQ'.
For further information, please visit the DVLA page 'Take a registration number off a vehicle'.