butterandjam
For about £30 you can buy a heated "throw" to snuggle under on your chair/sofa. The electricity costs between 3 and 5 p per hour , far cheaper to run than your boiler CH. Pick a quality made-in -UK brand which has thermostatic safety cut outs.
I think this is good advice. I don't know how many realise that some people, I am one, find that ageing brings ever lower low blood pressure, a slow pulse (in the 40 bpm range), and a core temperature which falls to 35C and even 34C sometimes!
Although the NHS advice is to call 111, no one actually cares and it is not as difficult as some are saying to just put a fleece on. I can be sitting with a fleece on, fleece boots, a hat and gloves and STILL have a cold nose and cold feet! I woke up last night cold, despite a good quality duvet and heavy blanket on top, my temperature was 35C in bed (14C in the room)! I had to go and make myself another hot water bottle.
My thyroid has been tested etc and the GP doesn't want to know 'we've done all the tests, you're fine). Our house is cold and the temperature often hovers at 16 or 17C without heating.