CCTV footage shows the 15-tonne mountain of congealed fat and sanitary products in a sewer in Kingston, south-west London. The massive lard lump was first noticed after the residents of a block of flats nearby were unable to flush their toilets. The 'fatberg' was blasted by high-powered hoses and took three weeks to clear. Thames Water says it's the biggest ever recorded in Britain, and was the size of a bus. They hope people will think twice about what they dump down the drain