There are some great booklets out there to help people keep warm and well over the winter months. The link below is to Winter Wise from Independent Age:
https://www.independentage.org/information/advice-guides-factsheets-leaflets/winter-wise
Help may be available from the Centre for Sustainable Energy for those struggling to pay their energy bills or living in a cold damp home this winter: https://www.winterwarmthbundle.org.uk/
If you live in Somerset they are able to provide advice through their freephone advice line 0800-082-2234.