H was an old certificate that the British Board of Film Censors used from 1932 until 1951. The "H" means "Passed as Horrific". It was replaced by X, the Board's first compulsory certificate, in 1951. The certificate was never compulsory, and children 16 or under (except in certain councils) could see an H-classified picture, but it was not recommended.
|British Board of Film Classification (BBFC)|