David Cameron is facing claims of a Downing Street cover-up after a senior aide was arrested on suspicion of an offence related to child abuse images.
Patrick Rock quietly resigned last month after officials were made aware of a potential offence, but Labour MPs have been asking why it took Number 10 so long to disclose the news.
ITV News Political Correspondent Libby Weiner reports:
Sources close to the Prime Minister have dismissed talk of a cover-up, saying Mr Cameron had spoken out "as soon as he could".
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