History of the London Underground to determine the cause. Following the incident, a system that stops a train automatically if the driver fails to brake was introduced at dead-ends on the London Underground. The Northern City Line was connected to British Rail tracks at Finsbury Park in the 1970s. The last tube train ran in October 1975, and British Rail services began in 1976. In 1977, the Piccadilly line was extended from Hounslow to Heathrow Airport, and in 1986 a platform serving Terminal 4 opened on a loop line. The Fleet line through central London was first proposed in 1965, taking over the Bakerloo line's
History of the London Underground fare zones for bus and underground trains, cutting the average fare by 32 per cent. This was challenged in court, the GLC lost and fares doubled in 1982. The fare zones were retained and fares dropped slightly the following year. In 1983 the Travelcard allowed travel within the specified zones on buses and underground trains, and was followed in Capitalcard in 1985 that included British Rail services. In 1984 control of London Buses and the London Underground passed to London Regional Transport (LRT), which reported directly to Secretary of State for Transport. By the early 1980s, the pre-war trains had