Homes in the UK are poorly insulated, likely due to a previous over-reliance on fossil fuels. https://www.theguardian.com/environment/damian-carrington-bl... Better insulation and switching to district heating where applicable could yield massive savings.
District heating still needs heat to come from somewhere. Admittedly, low grade heat like is used for heating can be stored for days in the form of hot water in insulated tanks.
