Almost Thames for a change; change from £1m

According to the estate agents, this is a "truly spectacular and quite unique" 1930s steel barge that has been converted into a magnificent contemporary houseboat. Almost 50ft of foredeck "provides enormous scope for al fresco entertaining" and there's 4,000 sq ft inside. Yours for £850,000 apparently. It's in St Katharine Docks near Tower Bridge so would be quite handy for a three-minute walk to my office ...