Hi Insider, thanks for your response. I really have no idea what caused the first belt to fail. I had flown back from a funeral on Thursday night, drove home from Stansted to Colchester. Next morning I started the engine put it into reverse and the steering wheel would not turn so I assumed it was the power steering, I checked the fluid level and it was fine. The mobile mechanic came out next day and found the belt was snapped, he was surprised there had been no warning light or any strange noises, however after fitting the belt it was noisy. I was able to use the heater until yesterday, as soon as I put it on now the engine stalls. Even without putting the heating on it makes strange noises. I just can't understand how it went from working to not working without any obvious signs of a problem.