They got the job done well. They're a Registered Corgi Gas Installer. Their quote was cheaper than anyone else's. Reasonably friendly and professional over the phone. The Council use them regularly so you can know they're not cowboys. (The plumbers or the Council? --qqzm) I don't know much about plumbing, but they seemed to be competent. --AlexChurchill DR has now also used them (for a small job) and found them to be good Snap --Admiral