Hi
Do a google search for Gap Insurance. There is some useful info. Confused.com issued a pros and cons page on 12/6/09.
Having spent 20k, is £400 worth paying for extra peace of mind ? Alot of Car Insurances will cover you for full replacement of brand new car, if stolen and not found or written off in the first year. If you can delay taking out the Gap policy for a year, this may save some money.
Huckster