Talking of cold, the newly installed boiler (July this year) has stopped working.
The neighbour who lives opposite is a boiler tester by profession. He has offered several times to help if he is needed, so I asked him to look at the boiler and decifer the error code. He tried the re-set button and other strategies, without success. Then he rang customer services who "dared" to suggest it was a low voltage supply causing the problem. We were able to test the voltage supply, no it wasn't that.
The original installer is celebrating with family, and his right hand man has a broken leg. An appointment has been made for an engineer to be here tomorrow morning.
The neighbour was also an aircraft engineer with the Reservists. I was extremely surprised when Customer services asked for his GasSafe registration number and he had the relevant card in his pocket, no need to return to his house to fetch it. I suppose when you are flying at 20,000 feet it is tricky to pop back for documents.