By Guy Taylor London’s six Overground lines are to be given a new name and line colour in a bid to make it easier for passengers to get around. Transport for London (TfL) said the “significant change,” which will include a major update to the capital’s tube map, would speed-up journeys while also celebrating the city’s “diverse culture and history.” It added that it’s research had shown some customers find the London Overground especially confusing and the network’s accessibility would improvie if it wasn’t one single colour and name. The Mayor of London, Sadiq Khan said: “This is a hugely exc…