Downing Street adviser Andrew Sabisky has resigned after a string of his controversial remarks were uncovered.

Number 10 was already facing calls to sack him over previous comments on eugenics, mind-enhancing drugs for children, FGM and women's sport, but stayed silent.

Tory backbenchers demanded that he be dropped after it was also revealed he said MPs should pay attention to the "debate" around "very real racial differences in intelligence".

Image: Dominc Cummings hired him as part of a drive to recruit 'misfits and weirdos'

Mr Sabisky - who was hired in Prime Minister Boris Johnson's special adviser Dominic Cummings' appeal for "misfits and weirdos" - confirmed he quit on Monday night.

"The media hysteria about my old stuff online is mad but I wanted to help HMG [Her Majesty's Government] not be a distraction," the 27-year-old tweeted.


"Accordingly I've decided to resign as a contractor.

"I hope No.10 hires more ppl w/ good geopolitical forecasting track records & that media learn to stop selective quoting."

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He also claimed to be "in the middle of a giant character assassination".

One of the posts that came under scrutiny was a comment posted beneath a blog in January 2014 made by a user named "Andrew Sabisky" and using the same avatar as his Twitter account.

"There are excellent reasons to think the very real racial differences in intelligence are significantly - even mostly - genetic in origin, though the degree is of course a very serious subject of scholarly debate," it said.

Image: Boris Johnson's spokesman refused to say what he made of the remarks

Downing Street was criticised for refusing to say whether or not Mr Johnson agreed with Mr Sabisky's views, prompting fury from some Conservatives.

Former minister Caroline Nokes said there "must be no place in government for the views he's expressed".

Select committee chair William Wagg declared "there is no way to defend it" and added: "I cannot be the only one uncomfortable with recent Number 10 trends."

One Tory staffer told Sky News after the resignation was confirmed: "I'm glad it's happened but he should never have been hired in the first place. Two days of bad headlines for nothing."

Ian Lavery MP, chair of the Labour Party, said Mr Sabvisky should "never have been appointed in the first place".

He added: "After Number 10 publicly stood by him today, Boris Johnson has serious questions to answer about how this appointment was made and whether he agrees with his vile views."

Questions are also being asked by Labour MP Stephen Doughty of the cabinet secretary - Whitehall's top civil servant - about what vetting Mr Sabisky faced before being hired and whether Mr Cummings was complying with rules governing the conduct of special advisers.

Pregnancies, drugs, Muslims and FGM - Andrew Sabisky's alleged past comments: