When not attending to garden tasks what other things have filled your day?

Thanks for that, but I've checked it.
If when the boiler is "on" and I turn the thermostat down past when it "clicks" it turns the system to "standby."
The "click" indicates what is the present temperature in the house. I set it at 22c. but it never gets up to that, by turning it down, when it "clicks" is the actual temperature in the hall where it is situated.
We don't close either our front room or dining room doors and the kitchen has no door at all. So the hall which has a radiator, will be the same temperature as the other rooms.
At the moment, it's "clicking" on 20c. as it's warmer outside today 3c, but if the temperature drops overnight, despite the boiler running continuously the "click" will happen at a lower temperature tomorrow. The radiators are hot, but not as hot as they used to be.
The boiler is six years old. It was serviced two weeks ago, so "something" must have been altered. We're on natural gas, like most of the UK.
I'm not over-worried, I'll let British Gas sort it out.