Always change your insurer each time as it will be cheaper as you are new business.
Daft thing is though, this year, I let my policy with Bennetts expire as the renewal was too dear. I then took out a new policy with Bennetts as it was cheaper than the renewal price of the old one!! Confused?? It's all so stoopid.
By the way, I prefer the Meercats adverts to the Go Compare fellow. Simples.