I'd agree wholeheartedly with Alistair.
I use Gott and Wynne and find them excellent. Good service, good quote, no problem with an agreed value and ( so I'm told because I haven't experienced this yet) very understnding when it comes to repairs and the fact that a trad isn't the same as other cars in matters of construction, panel fit etc etc
In terms of WHY I went for them- about 90% of the people I asked had very good things to say about them. The contact guy used to be Gavin Bishop, but I don't know if this is still the case
Cheers