A new study of 25 million British homes has found that just over half of homes only meet the insulation standards of 1976 or earlier.

The study conducted by EDF and property data platform Sprift, found that of 25 million homes in England and Wales, only just over 13.9 million, or 55%, met the insulation standards of 1976 building regulations or earlier.

The primary causes of heat loss in these homes are insufficient cavity wall insulation, absence of double-glazed windows, inadequate loft insulation, and poor floor insulation. These are all features that current building regulations require.