Michael Gove is at the centre of speculation suggesting he may be the source of the claims that the Queen backed Brexit in a row with former Deputy Prime Minister Nick Clegg.
The former education secretary is a close friend of Rupert Murdoch, owner of the Sun newspaper.
Gove is also going to head the Vote Leave campaign as chairman of its campaigning committee.
Gove's spokesman refutes the claims that he is the source of the story.
ITV News Political Editor Robert Peston reports:
Justice Secretary Michael Gove has refused to rule out being the source of claims that the Queen backed an exit from the European Union.
You can't say 'God says you must vote this way or that way' on Brexit, Archbishop Justin Welby said - adding that people should vote on fear
In an exclusive interview with me, the editor of The Sun confirmed the newspaper knows more than it printed as he hit out at Nick Clegg.