Draughtproofing windows, doors, floors, ceilings, penetrations, round pipes, beside wires in ceiling roses etc
Replace heating controller and thermostat with a better form of control like a programmable room thermostat or smart controller like Hive or Nest.
DraughtBusters provide a lot of good information on this website, they will help you if you are nearby and living energy poverty, and generally they are willing to advise and assist anyway.
Winter Watch is available to Reading residents who are on a low income and either over 60, have very young children, have a disability or health concerns. It aims to helps people on low incomes in Reading to prepare their home for heating during the winter months.