On 4 October 1981, following the Greater London Council election, the incoming Labour administration simplified fares in Greater London by introducing four new bus fare zones and two central London Underground zones, named City and West End, where flat fares applied for the first time [REF].
In 1983, a third revision of fares was undertaken, and a new inter-modal Travelcard season ticket was launched covering five new numbered zones; representing an overall cut in prices of around 25% [REF].