Boris Johnson backing Matt Hancock "risks jeopardising vital public health measures", the SNP said today.
The party said the Prime Minister's decision to retain the under-fire Health Secretary over his interaction with Gina Coladangelo raised "very serious questions".
And the incident - which saw him caught on camera in a steamy Covid restriction-breaking clinch with the aide he hired - cannot "simply be brushed under the carpet".
Kirsten Oswald, the SNP's deputy Westminster leader, said: "Boris Johnson risks jeopardising the vital public health measures in place the longer he desperately clings on to his shamed Health Secretary - just like he did with Dominic Cummings.
"The Prime Minister must at long last do the right thing and put his responsibilities to public health first.
"There must be public confidence in those setting the rules and it cannot be the case that it is one rule for the Tory elite and another for the rest of us.
"Despite declaring the matter closed, the reality is that it is anything but closed.
"There are very serious questions for Matt Hancock to answer over the appointment of his aide to the lucrative position, as well as questions over whether or not Hancock broke the ministerial code.
"This cannot simply be brushed under the carpet.
"The Prime Minister must remove the Health Secretary from his position immediately, and there must be a full independent public inquiry into Tory sleaze and cronyism without any further delay."
A video of Hancock kissing the married aide was published on Friday night by the Sun newspaper, sparking further calls for his departure.
In a statement, Hancock said: "I accept that I breached the social distancing guidance in these circumstances, I have let people down and am very sorry.
"I remain focused on working to get the country out of this pandemic, and would be grateful for privacy for my family on this personal matter."
A Downing Street spokesman said Johnson had accepted Hancock's apology and "considers the matter closed".
A snap poll by Savanta ComRes, released hours after photographs of the pair kissing in Hancock's ministerial office surfaced, found 58% of UK adults feel he should resign, compared to 25% who say he should not.
The Covid-19 Bereaved Families For Justice group, which represents those who have lost loved ones to the pandemic, also called for his head.
In a letter to the Prime Minister, the group said it has broken its "position of neutrality on ministerial conduct" to urge Johnson to sack him.
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