Martin wrote:
Our CH is programmed so that unless it is very, very cold it doesn't
come on at night and is set to a low temperature so that it is
virtually off during most of the day - the sun heats the living room
so on most days it isn't needed on anyway. We have Danfoss taps on all
the radiators.

The radiators are all switched off upstairs, and the 'cold' temp is about
10' for nighttime. But cos of the thermostat war, it's not always clear
to the central heating when it's night time