Try 1st Central. I was a bit sceptical at first, due to some of the feedback on various review sites, however most of the feedback seemed to date back to 2008 when it seems the company was first conceived. They were the cheapest by about £200. My direct line insurance went up by £50, even though nothing had changed.
I'm paying about £380 for my MK3 at the moment. 25yrs old and living in a low crime area.