Dominic Cummings has claimed more "damaging stories" will continue to be leaked even after Sue Gray has published the findings of her report until Boris Johnson quits.
Downing Street staffers have been too scared to submit all the evidence they have to Ms Gray's investigation in fear the Prime Minister "will see everything" Mr Cummings has claimed.
Whitehall enforcer Ms Gray is expected to release the full details of her inquiry from as early as tomorrow.
Her investigation not only includes lockdown parties held in Downing Street but also in the Prime Minister's Number 11 flat that he shares with his wife Carrie.
Mr Cummings said evidence that has been withheld includes more photos.
“This inevitably means that evidence, including photos, is not given to her and instead will keep leaking after her report," he said in his blog.
"(To stress, this is a consequence of beliefs about the PM’s integrity, not SG’s.)
“Other damaging stories will come out until he is gone.”
Also, Mr Cummings said today he was not meeting Ms Gray today, responding to newspaper reports.
Instead he has been submitting evidence to her investigation in writing so Mr Johnson cannot lie.
"When SG (Sue Gray) asked to speak to me I emailed to the effect: if we speak the PM will invent nonsense and spin it to the media and you and I will both have problems, let’s keep everything in writing, therefore he cannot invent things I’ve supposedly said to you, there is only a written record, this makes both our lives easier," he wrote in his Substack blog.
“She agreed. So I have answered questions in writing and will answer further questions in writing if she wants.
“But I will not speak and therefore provide the PM with more chances to lie and confuse everybody.”
Ms Gray will notify the PM about her findings a few hours before it's disclosed to the public.
Number 10 suggested it could be up to the Mr Johnson to decide what is published from her report.
The Prime Minister’s official spokesman said “it’s very much our intention to publish the findings in full as set out in the terms of reference”.
But asked if Ms Gray could therefore ask for the whole report to be published – even if Boris Johnson disagreed – the spokesman said: “I think it is a report that comes to the Prime Minister.”
