Sore looser or what???
If you don't think under £200 is good to insure a p38, you must live on a different planet. Maybe you could find some quotes that are significantly cheaper......
BTW - just updated my insurance on a different vehicle to include some mods. Was 100% standard before. The Princely sum of £40 extra. Although nearly £30 of this was the admin fee for making a change to the insurance. Running a Comparison website for the same broker showed there was an £8 difference in premium for stock to modified.