Young drivers are in-experienced drivers in the eyes of the insurance companies

Hence why you get to donate a kidney for a simple policy!
Have you tried Chris Knott insurance? I had a quote through Sky Insurance through here and my renewal was still around £150 cheaper than Sky's quote
I know my age is for me (touching Forty later this year) but around £330 fully comp for an RS Cabriolet was pretty good and Chris Knott have allways been good and been withthem for 9 years and would highly reccomened them to anyone