Labour MP Simon Danczuk said the Telegraph report about Craig Oliver and Maria Miller contained "serious allegations":
These are serious allegations about two special advisers which call their integrity and professionalism into question.
If Craig Oliver threatened the Telegraph without David Cameron’s authority, that looks like an open-and-shut breach of the special advisers' code.
But if the Prime Minister authorised his special adviser to use the threat of Leveson Report discussions to discourage the publication of an embarrassing story, then that is potentially even more serious.
And the same applies to Maria Miller and her special adviser Joanna Hindley – if these allegations are true then one of them has broken the rules.
David Cameron gives his backing to Culture Secretary Maria Miller after a Parliamentary watchdog launches an investigation of her expenses.
The Prime Minister's spokesman insisted he has confidence in his Culture Secretary Maria Miller amid a spat with the Daily Telegraph.