The Consumer Contracts Regulations give customers who buy goods from a dealer (so most finance contracts are excluded) the right to change their mind and cancel an order within 14 days of receiving the vehicle.
The customer's decision to cancel can be done in writing or orally. So dealers should be alive to customers who try and cancel over the telephone.
Cancellation in writing
Cancellation should be put in writing, either by letter (a proof of postage certificate of recorded delivery would be wise), fax or email.
A telephone call is not sufficient, unless both the customer and the dealer agree otherwise.