EB Plumbing & Heating 169a Milkwood Road, SE24 0JB, 07932663785. Had problems with my boiler fixed it fast and was very professional and even cleaned the system, something that British Gas did not do as the problem I had was originally sorted by them.He was shocked they actually did not clean the inside of the case. I asked him about flushing the system chemically and he quoted ?250.00 - ?300.00. Would highly recommend.