Sorry if IABU but please tell the jobcentre if you have children under 5 (or with disabilities) and you are on the benefits listed here. It's only £25 for each cold week but it will allow you to maybe put the heating on a bit more - and they can't pay you if they don't know. Once you're registered it comes automatically when the temperature drops.
Sorry. DWP Cold Weather Payment scheme launches for winter | The Oldham Times