The Clerkenwell Crime Syndicate, also known as the Adams Family or the A-team, is an English criminal organisation, allegedly one of the most powerful in the United Kingdom. Media reports have credited them with wealth of up to £200 million.

The Security Service, also known as MI5, is the United Kingdom's domestic counter-intelligence and security agency and is part of its intelligence machinery alongside the Secret Intelligence Service (MI6), Government Communications Headquarters (GCHQ), and Defence Intelligence (DI). MI5 is directed by the Joint Intelligence Committee (JIC), and the service is bound by the Security Service Act 1989. The service is directed to protect British parliamentary democracy and economic interests and to counter terrorism and espionage within the United Kingdom (UK).