If possible within your caring situation, planning to spend some time outside of the home may be a way of reducing your fuel bills.
London Borough of Merton Libraries offer warm spaces to the community.
Age UK Merton run a variety of activities for the over 50’s in Merton including a weekly lunch club which offers the opportunity keep warm and enjoy a hot meal in the company of others.
Wimbledon Guild run a range of activities, which offer the opportunity to spend time in the warm, whilst also connecting to others.