Boris Johnson has stood by Dominic Cummings despite mounting calls for the prime minister to sack his top aide for travelling to another home during lockdown.
But while Downing Street has brushed aside concerns raised by members of the public and some newspapers, it is struggling to contain growing fury from within the Conservative Party.
Backbench MPs have begun openly calling for Mr Cummings to resign or be fired, and discontent has spread to ministers – but they are still not going public with their concerns.
So which politicians have called for the prime minister's personal special adviser to go?
1. Steve Baker
A powerful enemy to have on the backbenches, Steve Baker sits on the executive of the 1922 Committee – the body representing all Tory MPs.
He told Sky News' Sophy Ridge on Sunday: "We are now in a nonsense position, a pantomime position where it seems if you wish to apply a wide common-sense interpretation to the rules you can do, at least if you work in Number 10.
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"It's ridiculous, it's got to stop and Dominic should go. If he doesn't resign, he will just be burning through Boris's political capital at a rate that we can ill-afford in the midst of this crisis."
2. Peter Bone
The Tory MP for Wellingborough told Sky News: "I'm certain he has to go."
"We can't really have a rule that applies to everyone except the government elite.
"He could have come out and apologised and said this was a bad mistake and Im sorry about it and I shouldnt have done it. And I think he probably would have carried on.
"But to try and pretend he didn't break the rules just doesn't stand up to scrutiny."
3. Simon Hoare
Speaking after Boris Johnson's full-throated defence of his senior adviser, Simon Hoare told the Daily Mail: "The PM's performance posed more questions than it answered.
"Any residual hope that this might die away in the next 24 hours is lost."
4. Damian Collins
Damian Collins, who found Mr Cummings in contempt of parliament for refusing to appear before the select committee he used to chair, said: "Dominic Cummings has a track record of believing that the rules dont apply to him and treating the scrutiny that should come to anyone in a position of authority with contempt.
"The government would be better without him."
5. Tim Loughton
The East Worthing and Shoreham MP says many people "made the choice not to 'reinterpret' the lockdown rules" and it is "even more important that they are followed even more relentlessly by those responsible for making and enforcing them".
He explained: "It is with regret therefore that I have come to the conclusion that the position of Dominic Cummings is untenable as the chief adviser to the Government and he must resign or be removed.
"But his continuing in the role any longer can only undermine the authority of the Prime Minister and the Government at a time when both need to be completely focussed on getting the nation through the next stage of the Coronavirus crisis.
"I am also worried that a number of scientists providing expert advice to the Government have also expressed the concern that their work is at threat of being undermined.
6. Jason McCartney
The MP for Colne Valley tweeted: "I fully acknowledge that the perceived hypocrisy of the rule makers potentially threatens the success of any future measures we may need to introduce if there is a second wave of coronavirus here in the UK.
"We must have confidence that we are doing the right things for the right reasons and that we are all truly in it together. For that reason I believe Mr Cummings' position is now untenable."
7. Sir Roger Gale
The Veteran Conservative Sir Roger Gale, who has served in parliament since 1983, said after the prime minister's news conference: "I'm very disappointed.
"I think it was an opportunity to put this to bed and I fear that now the story is simply going to run and run."
8. Craig Whittaker
Mr Cummings' position was branded "untenable" by Mr Whittaker, Calder Valley MP, who added: "You cannot advise the nation one thing then do the opposite."
9. Julian Sturdy
"It is becoming increasingly clear that Dominic Cummings' position is no longer tenable," the York Outer MP tweeted.
"The government need to urgently refocus on our national priorities, namely our efforts to manage the COVID-19 outbreak.”
10. Caroline Nokes
A former Cabinet minister, Caroline Nokes said: "I made my views clear to my whip yesterday. There cannot be one rule for most of us and wriggle room for others.
"My inbox is rammed with very angry constituents and I do not blame them. They have made difficult sacrifices over the course of the Read More – Source