I know that I cannot use No Claims Discount on the second car but my question will be a little bit different. I build 4 years NCB in last 4 years. But there was a moment when I bought second car. When I insured it I couldn't use NCB so second car had 0 NCB. After a year I sold a car and I got from the company 1 year NCB. Now again I have 2 cars. Can I use 4 years NCB for my main car and 1 NCB for second car? In theory I should, this is separate thing. Or I cannot?