Boris Johnson faced a tough grilling from an SNP MP over the controversial remarks of Number 10 adviser Andrew Sabisky who resigned last week after his views were uncovered online.

Johnson distanced himself from his former aide when Martin Docherty-Hughes criticised the remarks and Johnson's delay in addressing the issue.

Andrew Sabisky quit as a Downing Street aide following reports that he had suggested forcing contraception on working-class people to prevent a "permanent underclass".

The National:

He also came under fire for saying black people have IQs "close to the typical boundary for mild mental retardation", as well as for remarks he made about women which were uncovered by The National.

READ: Andrew Sabisky's vile Reddit posts about women and sex

Business Minister Kwasi Kwarteng, speaking after Sabisky's past remarks emerged, labelled them "offensive" and "racist".

Sabisky later tweeted his resignation, saying he did not want to be a "distraction" to the Government.

Docherty-Hughes (West Dunbartonshire), speaking about his brother Graham, who was born with cerebral palsy, criticised the delay in Sabisky being removed from his role as a Number 10 adviser.

The National:

"Graham was born with cerebral palsy, unable to talk, walk or feed himself. He brought joy and love to all who knew him," said Docherty-Hughes.

"Last week one of the Prime Minister's advisers resigned when a basic check of their internet history revealed that they had promoted eugenicist policies – the sort that would have ended my brother – Graham Docherty's – life before it began.

READ MORE: Andrew Sabisky made vile claims about women and sex on Reddit

"So, can I ask the Prime Minister of the United Kingdom to advise the House and every disabled person in this island why Andrew Sabisky remained at the heart of his Government and was not removed from their position immediately when their abhorrent views became apparent?"

Johnson responded: "Let's be absolutely clear that I certainly don't share those views and nor are they the views of anybody in this Government and that individual no longer works for the Government."

Labour's Stephen Doughty said he had written to the cabinet secretary, the Prime Minister and minister for the Cabinet Office asking a series of questions about the nature of Sabisky's appointment and his vetting, but had yet to receive a reply.

Doughty called on the Government to "respond urgently to those concerns which I think are in the national interest and the interests of the House to know".

READ MORE: Downing Street refuse to clarify Boris Johnson's views on eugenics

Raising a point of order in the Commons, the MP for Cardiff South and Penarth said: "The Prime Minister today laid a written statement about the security and defence review and it's been alleged to me that Sabisky was employed to specifically advise on that review.

"The Prime Minister seemed to suggest we were going to have an oral statement on that soon to come. Could he tell me, has he had any notice of when the Prime Minister intends to come and answer questions including who is advising on this very important review?"

Speaker Sir Lindsay Hoyle replied: "I certainly know that [Doughty] will not give up that easily. So I'm sure that on the benches that will have been heard and my advice will be, get some replies quickly."