In the UK, it is not parliament that supervises the BBC, but it is the BBC that supervises the activities of parliamentarians and their collaborators.
Notes from Wikiquote
il Vigilante (January 1, 2008)
Quote text and notes from Wikiquote: Peter Gomez (page history), available under CC BY-SA 4.0. Source quality and labels are our own summary of what Wikiquote records.