 Green Line had its origin in the network of coach services established by the London General Omnibus Company (LGOC) in the 1920s and 1930s.After World War II, the network was part of London Transport Executive/London Transport Board, and from 1970 to 1986 was operated by London Country Bus Services.Green Line Coaches Limited was formed on 9 July 1930 by the LGOC, which from 1927 had built up a network of coach services from London to towns up to 30 miles away, comprising 60 vehicles on eight routes.