Yo!
Just got a pleasant surprise - rang Peter James insurance to see if they would give me a classic policy (I was under the impression that you had to be 25 to insure a classic performance car), and it came out about £400. £600 cheaper than a normal policy for me! I'm 21 with 4 years clean driving.
That's no mods declared though. I'm going to ring them closer to the time I'm renewing it to check how much they want for mods - but he said for the odd modification, it won't cost much more, and mine is pretty standard performance wise.
Who are you guys insured with? Any other decent companies worth checking out?