Telegraph: When Nigel Robinsons parents built their home on a leafy hillside in north Brighton, it was 1958, a time of low-energy costs, and the environment came rather low down on peoples to worry about list. Yet Nigels mother liked to be warm, so when his parents designed their home, Peggy Robinson insisted that all the large rooms in the house were south-facing, with large windows, to maximise solar gain. Nigel and his wife, Sally, eventually inherited his parents home, and following a few years...