TWO British Gas " engineers "attended my annual boiler service which was working perfectly. When they left the boiler was not working and left me with no heat or hot water for two days. An EXPERIENCED engineer from a local independent company attended and repaired the fault which British Gas had created. I am a retired plumber and please take this advice from me : Avoid British Gas as many of their so-called engineers are without experience. I am now with HomeServe and they really are very good. Many Homeserve engineers have left British Gas due to its poor management practices.