James William Humphreys (7 January 1930 – September 2003) was an English businessman and criminal who owned a chain of adult book shops and strip clubs in London in the 1960s and 1970s. He was able to run his business through the payment of large bribes to serving police officers, particularly those from the Obscene Publications Branch (OPB) of the Metropolitan Police. His diaries—which detailed meetings he had held with police officers, the venues of the meetings and the amounts of bribes paid—provided evidence for the investigation by anti-corruption officers of the Metropolitan Police.
Humphreys became involved in petty crime early in life, and was first arrested at the age of 15. The severity of his crimes increased over time and, in March 1958, he was sentenced to six years' imprisonment after using explosives to open a safe and steal £8,260 in money and postal orders. On his release he opened a strip club in Soho, the centre of London's sex industry. As Humphreys expanded his business and moved into other areas of the sex industry—sex shops and book shops selling obscene material—he had to bribe an increasing number of officers to be able to operate.
In January 1972 Humphreys and his wife, Rusty, took Ken Drury—the head of the Flying Squad—and his wife on holiday to Cyprus and Beirut. Journalists from The Sunday People found out about the trip, and published details on its front page, along with allegations about the bribery from Humphreys and other pornographers. Drury was suspended from duty, and soon afterwards the new Commissioner of the Metropolitan Police, Sir Robert Mark, began an anti-corruption purge in the force. Humphreys was arrested for assaulting his wife's former lover and sentenced to eight years' imprisonment. In an attempt to have his conviction overturned or the sentence reduced, he gave a copy of his diaries to the anti-corruption police and was interviewed about the payments to the OPB. Thirteen members of the OPB were imprisoned for corruption.
Humphreys was released from prison early after assisting the police. He left the UK and set up an illegal amphetamine factory in Ireland, fleeing the country shortly before the premises were raided by the Gardaí. He travelled to the US and invested in a drugs-smuggling operation, but was cheated of his investment. In the 1990s he and his wife were living in London and were arrested for running at least three brothels in Marylebone and Marble Arch. He was sentenced to twelve months in prison; his wife was gaoled for eight months. The character Benny Barrett, played by Malcolm McDowell in the 1996 BBC television series Our Friends in the North, was based on Humphreys.