Prince Charles has won planning permission to install 32 solar panels on the roof of his London home. Clarence House, his furtive pseudo-palace between the Mall and Pall Mall, is already 'carbon neutral', thanks to carbon offsetting, efficient boilers and reliance on energy generated from renewable sources. The £150,000 panels should tip the building into carbon-negative territory. The decision comes just days before the heir puts the bunting out at Clarence House for his Start Garden Party, a festival to promote sustainable living. Image ChrisO.