(the last full year of independence for the Met), the guide extolled the benefits of "The good air of the Chilterns", using language such as "Each lover of Metroland may well have his own favorite wood beech and coppice — all tremulous green loveliness in Spring and russet and gold in October". The dream as promoted involved a modern home in beautiful countryside with a fast railway-service to central London. By 1915 people from across London had flocked to live the new suburban dream in large newly built areas across north-west London. Interwar suburban expansion in England Suburbanization in the interwar period was heavily influenced by the garden city movement of Ebenezer Howard and the creation of the first garden suburbs at the turn of the 20th century. The first garden suburb was developed through the efforts of social reformer Henrietta Barnett and her husband; inspired by Ebenezer Howard and the model housing development movement (then exemplified by Letchworth garden city), as well as the desire to protect part of Hampstead Heath from development, they established trusts in 1904 which bought 243 acres of land along the newly opened Northern line extension to Golders Green and created the Hampstead Garden Suburb. The suburb attracted the talents of architects including Raymond Unwin and Sir Edwin Lutyens, and it ultimately grew to encompass over 800 acres. During World War I, the Tudor Walters Committee was commissioned to make recommendations for the post war reconstruction and housebuilding. In part, this was a response to the shocking lack of fitness amongst many recruits during World War One, attributed to poor living conditions; a belief summed up in a housing poster of the period "you cannot expect to get an A1 population out of C3 homes" – referring to military fitness classifications of the period. The committee's report of 1917 was taken up by the government, which passed the Housing, Town Planning, &c. Act 1919, also known as the Addison Act after Dr. Christopher Addison, the then Minister for Housing. The Act allowed for the building of large new housing estates in the suburbs after the First World War, and marked the start of a long 20th century tradition of state-owned housing, which would later evolve into council estates. The Report also legislated on the required, minimum standards necessary for further suburban construction; this included regulation on the maximum housing density and their arrangement, and