The Investigatory Powers Commissioner (IPC) is an "Arms-Length" public official in the United Kingdom who oversees the use of investigatory powers of public authorities such as Police, Law Enforcement Agencies, Intelligence Services, Local Councils and Prisons.

[3] The Investigatory Powers Commissioner is appointed by the Prime Minister of the United Kingdom for a term of 3 years, which can be renewed, they are typically a former or current Senior Judge.

The Investigatory Powers Commissioner and their Office carry out their functions of ensuring the use of investigatory powers used by public authorities are lawful and necessary,[4] independently of the Government and although it works closely with it is not part of the Home Office, However funding for IPCO is made available by the Home Secretary.

[7] Any warrant issued by a Secretary of State, Minister or Chief Officer authorising the surveillance or interception of information must be approved by a Judicial Commissioner from the IPCO, and must meet the criteria necessary to authorise the warrant.

[13] The Current DIPC is Sir John Goldring[12] (Who appointed) Liz Truss