Professional team were sent to deal with the problem.
Review by confirmed purchaser
Dan Mitchell and Justin Day were sent to fix the central heating and hot water issues which involved digging up floors to find the cause of the leak which was disruptive to the household but they were able to sort it. They went beyond the call of duty by moving furniture where it was needed and were punctual, courteous and kept the household informed of developments the whole time they were at the property. Pimlico Plumbers are not the cheapest firm there is but having used both Dan and Justin before and knowing that they would solve the problem it made sense to use them. Of course next time I have to use Pimlico I expect a vast bunch of flowers, champagne and caviar for being so nice about them both!