My daughter booked in her car with Halfords (ref. A216B004642) for a diesel particulate filter deep clean treatment. After this work was completed she was told that it had not been successful. Apparently she was told before paying her 85 pounds that this treatment may not work. Trading Standards have told me that if this was the case then it forms part of the contract and therefore she is not entitled to a refund. Halfords have refused to issue a refund. So if you like gambling then Halfords is the place to go, alternatively if you want to save 85 quid take your car to someone who can guarantee their work. Most unimpressed.