Tom and Sam arrived promptly on Monday, even phoning to tell me they were on their way and how long it would take to get to me. My problem turned out to be rather complex, so despite their testing everything before they left later that morning, the fuse again cut out twice more until eventually they found the root of the problem after kindly returning within hours, all on the Monday. They are really first class, friendly and tidy and I would be happy to recommend them.