Just a side note - the garage/shop doesn't have any liability unless you notice a problem before driving it away.
My dad had a similar problem with his car. One garage did a service on it. He noticed a problem with it after driving it and took it to another garage. They basically said the part in question (can't remember what it was now but principle the same) had been taken off, and over tightened when put back and the entire part had to be removed and replaced costing over £500!!! Dad called a solicitor and they said no point pursuing it as the garage can claim that the damage was done after it left their premises and you have no way of proving otherwise. So he was left having to pay a costly bill for someone else mistake...
