A recent clean-up operation below one of London's busiest areas was undertaken by Thames Water. The sewers beneath Leicester Square suffer more than most others in London from the huge quantities of cooking oil and fat deposited into them by surrounding fast food outlets and Chinese restaurants. The amount removed this time did not 'cover an area the size of Wales' but could fill, it was estimated, 9 double decker buses. Surely one of the most unpleasant jobs in London?
Author of Subterranean City, Beneath the Streets of London, London's Coffee Houses, Decadent London, The Folklore of London, Subterranean City (Revised and Expanded Edition), Netherwood, Last Resort of Aleister Crowley, Lord of Strange Deaths, the Fiendish World of Sax Rohmer; Secret Tunnels in England, Folklore and Fact