I live in a crappy rented accommodation and we have a problem, that is our landlord won't allow us to install a second boiler. As a consequence the upper floor is bloody cold as there's no enough pressure to heat the radiators.
We managed to survive until December but now is the bloody cold season and we are freezing. We can stay in the common room downstairs but at night it's a pain to sleep. Even using 2-3 blankets, they get cold after a while.
Going back 10-11 years ago, I spend a whole winter in a caravan in the East of England. I was using a sleeping back and I was ok all night. When I left, I left my sleeping bag to my co-workers (We were working in a sh!tty packhouse in Spalding) and didn't buy any sleeping bag ever since. So I don't know what to buy and maybe the technology has improved ever since.
I see a very cheap mummy type sleeping bag at Halfords, which is around the corner from where I live:
It seems to have good reviews. I know it's hard to judge from a picture, but has anybody ever bought/used it and what do you think about it? It is too cheap. The price of a sleeping bag can range from a few quid to £500. Is it worth investing £10 for a bag that I would be using a couple of months?