I’d of course heard of the Camberwell carrot but the Camberwell submarine was a recent discovery. Located at Akerman Road, London SW9, for a while its purpose was something of a mystery. Nuclear bunker? Brutalist monument to sailors lost during the war? It must be said, since it had its chimneys raised by four metres several years ago, it looks far more imposing and much less than a submarine. Anyway, its purpose is fairly prosaic – it houses the boiler plants for the local housing estates; something which is fairly obvious when you walk alongside it and receive blasts of hot air.