The BBC and South Yorkshire Police have been summoned to appear before MPs to explain how the broadcaster knew Sir Cliff Richard's home was to be searched, the BBC reported.
Home Affairs Select Committee chairman Keith Vaz gave both institutions a deadline of today at midday to reply to his letters.
It comes after the singer's Berkshire apartment was searched by police as part of investigations into an alleged sexual offence which took place during the 80s - allegations Sir Cliff has vehemently denied.
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Mr Osborne said he is "not the person to provide the unity my party needs".