Used Northolt plumbing for a boiler fault, two guys came, got the boiler running got paid, but not heating the rads, they said there was rust in the system as it hadn't been used for 4 days, was told to leave it running, still no heat. They came back with somebody else next day and said it was the pump, fitted new pump still no working rads. Then somebody else came and said somebody turned the gas valve down and it wasn't me. Rads now working but boiler running constantly, worked for a week then no heat, called them back they then said the circuit board was faulty. So Waisted £300. Then found a professional company to fit a new boiler, london central heating, a Polish company in Sudbury hill, job done in one, day 5 stars read more