Suggestions Mr Johnson would carry out a mass cabinet reshuffle have circulated all summer. Today, the Prime Minister acted on those reports, promoting and demoting many of those closest to him in Government. Gavin Williamson, the former education secretary, has been viewed as the most high-profile sackings.
There had been question marks over his role by observers ever since the GCSE and A-level results debacle last year.
And while he appeared to better safeguard examinations this year, he has been replaced by vaccines minister Nadhim Zahawi.
Nadine Dorries has been perceived as the most surprising of replacements — a best-selling novelist taking the Culture Secretary role from Oliver Dowden.
Her move has not been without controversy, as Anna Soubry, the former Conservative and Change UK MP, said it proved Mr Johnson was the "worst Prime Minister ever".
Condemning him and the Government, she wrote: "The appointment of Nadine Dorries as Culture Secretary is final confirmation (if you needed it) that we do indeed have the worst Prime Minister and Govt ever. Ever."
Ms Soubry no longer has any influence in Westminster.
After defecting to Change UK, she lost her seat in Broxtowe to the Conservatives Party's Darren Henry in 2019.
Change UK dissolved within ten months of being founded. The group was formed in the run-up to the December 2019 general election.
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It hoped to have sway in blocking the UK's exit from the EU by supporting a second referendum.
Ms Soubry continues to carry the anti-Brexit flame on social media.
Recently, in response to a tweet by LBC reporting the news that "Ikea stores are facing product shortages due to Brexit and lorry driver shortages", she replied: "Brexit was built on lies.”
Meanwhile, several other swaps have taken place in Mr Johnson's cabinet.
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Housing Secretary Robert Jenrick has been fired and will be replaced by Michael Gove. Mr Gove will hold on to his current responsibility for the Government's "levelling up" agenda - spreading wealth and opportunity around the country - and handling demands for another Scottish independence referendum.
Chancellor Rishi Sunak and Home Secretary Priti Patel have kept their jobs.
Dominic Raab has been replaced as Foreign Secretary by International Trade Secretary Liz Truss.
Mr Raab had come under fire for his handling of the UK's evacuation efforts in Afghanistan after the Taliban takeover.
He is believed to have had a conversation with Mr Johnson before his new roles of Justice Secretary and deputy Prime Minister were announced.
Mr Raab previously stood in for Mr Johnson last year while the Prime Minister was ill in hospital with coronavirus.
He was already seen as his de facto Deputy Prime Minister, but his new title formalises it.
Elsewhere, Mr Dowden has been given the role of minister without portfolio at the Cabinet Office.
He will also become Conservative Party co-chair, replacing Amanda Milling.
And Mark Spencer stays as chief whip, overseeing party discipline.