My car is registered outside the UK, is this OK?

If your car is registered outside the UK, this is no problem. You just need to ensure that you can give us the same details as would be found on a UK V5C registration certificate. You'll need this certificate to travel across borders with your car and is frequently called a "Car Passport" or "Machine Passport". It will contain key details for you car such as the Registered Owner, Make, Model, Engine Size, Chassis Number, Engine Number, Registration Number et al.