Ok, here goes... Using a central Cardiff City address, and your details, I've had a quote off Tesco for £710. Now that's using a 2001 on Civic Type R 1590cc 3rd S (since you don't specify your spec) with NO MODS. That's fully comp with the highest excess they offer and no legal prot.
Your non std alloys for a start will add £200 onto that, not to mention your other mods, so either you've gone for 3rd party only, you're shagging an employee of Tesco's Insurance, or you've lied about your mods in which case god help you if you ever need to claim.