I just received a quote from a local french car specialist, just a small set up, but next door to where I work, so thought i'd ask because of the convienience. They came back with 570 quid and they would need the car for 2 days as it's a fiddly job. I declined and quoted some of the prices found here, they said they couldn't see how it could be done for that price, and, are you sure it includs vat.
Anyway I'm still doing some shopping around, how long does it actually take anyway? I really can't be without my car. and i need to get it done before I'm without it permenently if it goes bang !