I couldnt recommend Adrian Flux enough mate. Ive just renewed my insurance with them for the 3rd year and didnt have any problems.
All mods covered and its only costing me £350 for the year. Thats with a speeding fine ansd well Im in a high risk postcode.
I'm paying £600 with adrian flux with ncb protection and all my mods declared, down to the roll cage lol they were cheaper than Bell/Admiral with just alloys & exhuast declared.