Revisit: Bletchley 2026

Kevin McCloud catches up with energy conservationist Andrew, who in 2017 decided to build a radical, self-heating home for his family - the first of its kind in the UK. The aim was to heat the house all year round by storing the warmth of the summer sun into insulated earth banks over and around the house, and then drawing the warmth back into the living spaces in winter. Six years since his last visit, Kevin McCloud returns to see if this groundbreaking experiment has proven a success.