I am recommending Filippo Sciabetta -- he did my boiler maintenance in October, efficient and low cost.
Yesterday I called for a difficult problem with cold water in bathroom---thought it was the taps but he checked everything and said it was a system problem, maybe an old blockage or old pipes ... somewhere...? It took persistence and imagination to diagnose and rectify it; am very glad with his work which avoided major disruption of floors, ceilings, loft, etc. Excellent. Phone 07931 849 940.