BORIS Johnson has appointed the brains behind the controversial Vote Leave Brexit bus pledge to be his new Chief of Staff.

Dominic Cummings, who was found in contempt of parliament in March for refusing to appear before MPs, will serve as one of the Prime Minister’s key aides.

The outspoken and abrasive strategist coined the phrase “vote leave, take control”.

He also came up with the promise of an extra £350 million to be spent on the NHS every week; a vow that was famously plastered on the Vote Leave campaign’s battle bus.

READ MORE: David Mundell loses job in brutal Boris Johnson Cabinet purge

Just four months ago he was ruled to be in contempt of parliament after failing to appear before the Commons’ Digital, Culture, Media and Sport Committee during its investigation into fake news stories during the EU referendum campaign.

News of the appointment sparked outrage.

Sarah Wollaston, a former Tory MP who quit the Tories this year and now sits as an independent, called it “an appalling error of judgement to appoint someone who has been in contempt of parliament”.