1950

1951
Controversial subjects on film were accommodated in the UK under the new 'X' category and it incorporated the formed advisory 'H' category given to horror films.
The growth of television ownership eroded the adult'family cinema audiences and the popular Press suggested that there was increased teenage criminality when in fact there was no evidence of a teenage crime wave.

1954
Concerns about juvenile delinquents delayed the classification of Laslo Benedek's film The Wild One for thirteen years because the Board described the contents as 'a spectacle of unbridled hooliganism'. Riots in English seaside towns involving Mods and Rockers (Margate and Clacton in 1964) were cited as providing justification for the Board's continuing objections to the film.

1955
Richard Brook's The Blackboard Jungle was submitted and the first reaction of Arthur Watkins was to reject it on the grounds that 'filled as it is with scenes of unbridled revolting hooliganism it would, if shown in this country, provoke the strongest criticism from parents...and would have the most damaging and harmful effect on young people'
The rejection decision was challenged by MGM and the film was viewed again by the Board President which resulted in another rejection.
A series of negotiations that began, resulting in substantial cuts for an 'X' certificate.

1956
The Board felt able to offer an 'X' with cuts to details of drug-preparation and some incidental violence.
Arthur Watkins resigned and was replaced as Secretary by John Nichols.

1958
John Trevelyan became Board Secretary.
Upheaval in social and class barriers that followed the war is reflected in films like Jack Clayton's Room At The Top which generated much amicable negotiation between John Trevelyan and Romulus Films on the language used in the film.