The offer may be valid for a few weeks so even if you haven't yet found a car you still have plenty of time.
Finding and paying
Once you have found and agreed the deal for your car, you may need to provide details of the registration and mileage to you lender. This is to allow them to value the car against industry norms to make sure that the value makes sense in relation to the loan.
In many cases the money may be directly transferred from the online car finance lender to the dealer and the vehicle will be yours.