So I kerbed one of the front tyres on our holiday car rental, in Paulliac. Oops! I had some help to put on the emergency tyre, who gave me Christophe's number at Medoc Pneu. After both me, with limited French, and Christophe with limited but better English struggling through a phone call we opted to visit and he was able to obtain a 245/45 R18 96W Continental tyre for fitting the next day. Christophe gave us fabulous service, helping us to enjoy our remaining tour of France