My Vaillant heating and hot water gas boiler broke the night new tenants moved into my flat at Kew on a Friday night last year when I was in Scotland. Steffan was due to go on holiday about five days later, but his assessment of the boiler was the same as two other plumbers, one who had installed it and another who had serviced it. He took out the old boiler and installed a new one immediately after the weekend, my tenants are from South America and have remained extremely grateful he dealt with this problem so quickly and efficiently. I have since had to consult him about a loud noise made by the water when the bathroom is used and I will ask him to see whether he can mend this problem in a few weeks. He is extremely honest and very competent and I thoroughly recommend him. I know he also works for two local estate agents in the area who obviously would only employ a very reliable plumber in the properties they deal with.