Most I've ever had was 3 cars during 1 policy... First time they did not charge me, second time I was changing the car they did, I guess it either depends who you talk to or they just give you one free courtesy change... But yes, I was going from a 1.2 Ibiza to EK3 and they charged me a lot less than what they would have if I was buying a new policy for EK3, funny how this whole insurance works!