Took car to St Albans 8am for diagnosis of rattling under wheel arch - car under warranty. They phoned at 3pm to say it was the main drive shaft, not covered by warranty and would be £700 to fix. I contacted the dealer I bought the car from and told him. He called the warranty rep who said the repair would be covered under the warranty and who contacted Halfords St Albans to ask why they had told me it wouldn't be - but got nothing in the way of explanation. The dealer asked me to bring the car back to him and took it for a drive with me. He is confident the problem is NOT the main driveshaft and, even if it had been, the £700 quote was extortionate. In his words, Halfords were trying to con me, as a female who had no idea what the issue was (and knows nothing about car engines) and had blatantly lied about the repair not being covered by the warranty. Never going near Halfords again.