For general advice about money or pensions that you can trust, visit MoneyHelper
For advice if you are struggling to pay your mortgage: Mortgage advice
Ofgem have lots of help and advice for households, including how to make a complaint about your energy supplier, and what to do if you can’t afford your energy bills https://www.ofgem.gov.uk/information-consumers/energy-advice-households
Lots of companies are offering help and reductions on goods - you can find links here Help for Households
If you want to reduce your energy usage, there is help and advice here https://www.gov.uk/improve-energy-efficiency
Age UK have a good explanation on what happens when your energy supplier goes bust, and sources of support for paying energy bills. https://www.ageuk.org.uk/information-advice/money-legal/debt-savings/energy/changes-to-energy-prices/?utm_source=twitter&utm_medium=social&utm_campaign=energy&utm_content=supplier_bust
Simple Energy Advice have lots of links and tips https://www.simpleenergyadvice.org.uk/pages/help-paying-energy-bills
The Energy Saving Trust have lots of tips on how to reduce your energy usage https://energysavingtrust.org.uk/energy-at-home/
The Money Saving Expert website also has lots of useful advice https://www.moneysavingexpert.com/energy/
The CAB have lots of useful help and advice about energy bills, and residents in BCP can access Winter Warmth Support here https://www.citizensadvicebcp.org.uk/campaigns/winterwarmthsupport/ and information for Dorset residents here https://edpcitizensadvice.org.uk/
Dorset Council have advice and support here https://www.dorsetcouncil.gov.uk/housing/financial-help/heating-and-insulation-grants
Help and advice for BCP residents https://www.ridgewaterenergy.co.uk/projects-and-services/help-for-warmth/