Harry Beck version of the London Underground diagram. In March 2013 a blue plaque was unveiled on the house where Beck was born, in Wesley Road in Leyton, to mark the 80th anniversary of the Tube map. GB Railfreight named locomotive 66721 after Beck in January 2007. Beck's idea has been emulated by subway, bus and transit companies around the world and many urban rail and metro maps use his principles. He was featured on a BBC2 series called "Map Man" in 2004. Harry Beck Henry Charles Beck (4 June 1902 – 18 September 1974), known as Harry Beck, was an English
Blue plaque plaques in a variety of shapes and colours. The first plaque was unveiled in 1867 to commemorate Lord Byron at his birthplace, 24 Holles Street, Cavendish Square. This house was demolished in 1889. The earliest blue plaque to survive, also put up in 1867, commemorates Napoleon III in King Street, St James's. Byron’s plaque was blue, but the colour was changed by the manufacturer Minton, Hollins & Co to chocolate brown to save money. In total the Society of Arts put up 35 plaques, fewer than half of which survive today. The Society only erected one plaque within the square-mile