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Switched central heating on, set thermostat, a bit of time has elapsed (maybe a quarter of an hour), not feeling any difference yet. No thermostatic valves on any of the radiators.
Never open doors if you don't dare to walk on through ...
I will have to ask my boyfriend who will call in an hour. I hope it is not too cold there. Here I would freeze as it is under 20F. But have natural gas heat so had the furnace man in for a check. Maybe its your boiler? I remember my bf had to get a new one last year. There are probably furnace people who check them where you are in England. Check google. Not good to be cold in winter!