As well as adding double glazing and insulation, he has turned the heating right down.

BBC: How warm is your home?

It said basic energy-efficiency measures such as loft and cavity insulation, double glazing and new boilers had prevented up to 35, 000 Scottish households from falling into fuel poverty over the past year.

BBC: Fuel poverty affecting more Scottish households

It will pay for the installation of things like double glazing and solid wall insulation.

BBC: Funding of ?60m to target fuel poverty areas in Scotland