Some of it depends where your thermostat is. The temperature in the hall (where they are often so stupidly sited!) will often be much lower than a bedroom. I had Smart radiator valves fitted a couple of years ago, because downstairs was freezing and upstairs roasting (just the opposite of what I wanted!)
I have frozen all week. I’m really trying to tough it out, but 16° is just too cold for me, no matter how many jumpers I put on. (Two since you ask. And a knitted cowl, an extra pair of knitted socks, a vest and fingerless gloves. I’m ok if I’m moving around (although my nose, feet and hands are freezing) but to work or watch tv I have to wrap myself in a blanket and have a hot water bottle on my lap and one on my feet. Nighttime is fine, I’m not doing anything different.
The best thing about the Wiser thingy is that I can have different temps in different rooms. 18° is fine for the hall and kitchen, but I need 21° in the sitting room and my office. I keep DD’s bedroom at 19, usually. I don’t heat my bedroom at all, apart from a half hour blast for when I’m getting up.
I’ve been broke for a while (it’s not related to everything else and shouldn’t last) and although it’s no fun, most of it doesn’t bother me most of the time. All of the not doing beauty treatments, not buying clothes and house stuff, not going/eating out doesn’t really bother me. I was doing ok making do with books, movies and yarn I already have - I was profoundly grateful that I had a warm, comfortable house, homemade steak, chips and cake and a hot bath for kicks. It was enough to feel content.
Now, I’m fucking freezing and have lost that small comfort. I don’t care if people think it’s whiny and ‘there’s plenty worse off than me’. I’m cold, uncomfortable and miserable and I’ve had to give up even tiny non-essentials to get through. When I was warm and a few tiny luxuries (a bath costs 50p. A supermarket steak is about three quid. Everyone should be able to afford treat themselves to one if they want to occasionally) I was poor but happy. Now I’m not. I’m still miserable and people being more miserable doesn’t invalidate my misery (and I have every sympathy for them. This sucks)