from
www.bobatoo.co.uk:
A Q number plate means that a vehicle doesn’t have a fully recorded history and the car’s age or identity is in doubt.
However, while many may presume a Q plate registration and the use of the letter ‘Q’ implies a vehicle’s history is ‘Questionable’ - it’s suspected that instead the letter Q is used because this letter is never used in traditional vehicle registration plates.
A Q plate car is therefore easily distinguished as being ‘different’ to other [normal] non-Q plate cars that have a full historical record.
You may be surprised to learn that Q-plates have been used on cars since the 1930s but there are still not many vehicles like this around, hence the likelihood is you are yet to see or notice one.
Once the Driver and Vehicle Licensing Agency issues a DVLA Q plate for a Q registered vehicle, any previous vehicle registration that may have been erroneously connected to the car is no longer valid.
What sort of cars typically have a Q plate?
A typical Q plate car is usually any of the following types of vehicle:
self-built kit cars or kit converted vehicles
rebuilt vehicles
a radically altered vehicle or significantly modified cars
a military vehicle previously owned by the Ministry of Defence (MOD) (whose history is very often classified for security reasons)
cars without a VIN (Vehicle Identification Number) on them
self-imported vehicles
reconstructed classic cars or vehicles
old vehicles