Just had new EBC Red Stuff pads fitted on the front brakes of my 2004 V10. The pads cost about ?100 (actually a lot less because I bought them in the USA when the pound was about $2, but at present exchange rates they come out at about ?100. Factory equivalent pads were very much cheaper) They were fitted by the VW dealer in Calais as part of the 30,000 mile service at a cost of well under ?50 as far as I can tell from the bill.
When I need new discs I will bring those from the USA as well, even though they are made in Italy, and they seem to cost about ?150 per set.
Labour rates in Calais are so much lower than Guildford or London that a nice day out, a good meal and some wine at Peradel still costs less than the straight service charge in London and the staff are much more polite than at a certain dealer in Battersea.
Be warned however, in France VW recommend an oil for the V10 which VW UK insist must not be used and needed to be removed immediately, at least that is what they said in writing after repeatedly telling me that VW Spec 507 00 is fine for the 2004 V10, but that is another story.
So, on balance I would still go to Calais, have a nice day out, a good meal, good service and the satisfaction of not feeling ripped off.
Sorry this advice is a bit late, but it might be useful to other members.