Chorleywood the Local Government Act 1894 created districts as subdivisions of the newly created county councils, Chorleywood became part of the Watford Rural District, which encircled Watford. In 1913, the town was separated from Watford Rural District to become Chorleywood Urban District. In the early 1960s, researchers at the British Baking Industries Research Association in Chorleywood improved upon an earlier American bread-making process. This resulted in the Chorleywood Bread Process which is now used in over 80% of commercial bread production throughout the UK. In the 1973 BBC Television documentary, "Metro-land", Sir John Betjeman described Chorleywood as "essential Metro-land". In 1974,
Chorleywood the Chorleywood Urban District, Rickmansworth Urban District and most of Watford Rural District were merged to form the Three Rivers non-metropolitan district. Chorleywood has grown remarkably in the past century following the extension of the Metropolitan line of the London Underground which reached Chorleywood in 1889. Chorleywood station is in Zone 7, situated between Chalfont and Latimer and Rickmansworth. The majority of trains stopping at Chorleywood are operated by London Underground but the station is also on the Chiltern Railways line running between Marylebone and Aylesbury. Junction 18 of the M25 with the A404 is at Chorleywood. The 336 bus