There are a number of schemes that you may qualify for along with the extra assistance recently announced by the Government. You can find all of this information and check whether you are eligible here.
Priority Service Register
The Priority Services Register is a free support service to help people in vulnerable situations. Energy suppliers and network operators offer it. Each keeps their own register. You need to contact your energy supplier or network operator to get on it.
You can find out more here – Getting extra help with the Priority Services Register