Wikipedia
The Arifs are a South East London-based Turkish Cypriot criminal organization heavily involved in armed robbery, contract killing, drug trafficking and other racketeering-related activities within London's underworld since the late 1960s. Following the downfall of the Kray brothers, the Arifs were one of several criminal organizations who took control of the London underworld including the Clerkenwell crime syndicate and the Brindle family with whom they were engaged in a highly publicized gangland war during the 1990s.
The Arifs themselves were considered the leading crime family in the London area throughout the late 1980s before the arrest and conviction of most of its leadership, including most of the Arif family members, for armed robbery and drug-related offences in early 1990s. In 2004, the Irish Daily Mirror called the Arifs "Britain's No 1 crime family." And also by some media outlets in 2016.