re M&s Car Buying plan, its is just a personal loan really not secured at all.
Also I believe, but will have to check but at the end of the 48 months you can carry on paying at the same monthly payment for an additional 16 months and what ever is left then is paid as a very small final payment is any but will have to check.
Think arrangement is £45 ish but cancellation Im not too sure without check the paper work again...brain drain it seems today
Good Luck, hope they say yes !!