I just bought a 20vt coop (picking it up tomorrow)...
Adrian Flux (who I was with for previous 2 1/2 years quoted me £1050!!)... I dont think so.
So thanks to this forum I tried Noel Dazely who quoted me £620, I'm 30 with 2 years no claims and no accidents/points/convictions, car has light mods (wheels/exhaust/K&N)....
So I would recommend you give them a bell. I also tried Greenlight but they couldnt quite match ND.
The other thing I have found is that I manage to get straight through on the phone to ND, whereas sometimes you wait forever when calling Adrian Flux.