David Mundell has been appointed Scottish Secretary in the new all Conservative cabinet.
Mr Mundell is the only Tory MP north of the border David Mundell and takes over from Liberal Democrat Alistair Carmichael who held the post held during the coalition.
He was congratulated by Scottish Conservative leader Ruth Davidson, who said: “I am absolutely delighted at the decision by the Prime Minister to promote him. At a momentous time in our politics we need calm and experienced leadership, and that is exactly what David will bring to this post.
“Having worked extensively across both Holyrood and Westminster he is quite simply the right man for the job. He will ensure that Scotland’s two governments work well with each other and always in a spirit of mutual respect and co-operation.”
Boris Johnson will be a member of David Cameron’s political cabinet but not a minister.
The newly-elected MP for Uxbridge and South Ruislip walked in through the famous black door carrying his cycle helmet and Mr Cameron swiftly revealed the appointment on Twitter.
Other Cabinet appointees announced on the first working day of the new Conservative-only Government included Sajid Javid as Business Secretary, in a promotion from culture, media and sport, replacing Vince Cable in one of a number of posts left empty by the end of the coalition with the Liberal Democrats.
Former Commons Culture Committee chairman John Whittingdale replaces Javid as Culture Secretary, with next year’s 10-yearly renegotiation of the BBC’s Royal Charter at the top of his in-tray. Mr Whittingdale last year described the BBC licence fee as “worse than a poll tax” and said it was “unsustainable” in the long run and needed tweaking immediately.
Hastings and Rye MP Amber Rudd is one of a number of women being promoted by Mr Cameron, moving upwards within the Department for Energy and Climate Change from a junior ministerial position to the Cabinet-level Secretary of State role vacated by Lib Dem Ed Davey, who lost his seat last week.
Priti Patel will replace Esther McVey, who lost her seat, as Employment Minister. She will attend Cabinet but will hold the rank of minister of state.
And the Prime Minister confirmed Baroness Stowell would be promoted to full Cabinet rank as Leader of the Lords.
Mr Cameron also confirmed that Patrick McLoughlin is to carry on as Transport Secretary in the new Cabinet.
Liz Truss, who had been tipped for promotion in the reshuffle, will continue Environment Secretary.
Anna Soubry has been moved sideways from minister of state for defence to minister of state in the Department for Business, Innovation and Skills, whereshe will have responsibility for small business. She will attend Cabinet.
Eric Pickles has been removed as Communities and Local Government Secretary, to be replaced by former universities minister Greg Clark.
Justine Greening is to remain International Development Secretary.
Theresa Villiers stays in the Cabinet as Northern Ireland Secretary.
Jeremy Hunt is to remain as Health Secretary.
Oliver Letwin has been promoted to be full member of Cabinet and will be inoverall charge of the Cabinet Office. Stephen Crabb remains Welsh Secretary.
Chelsea and Fulham MP Greg Hands becomes Chief Secretary to the Treasury and will attend Cabinet. He replaces Liberal Democrat Danny Alexander in the secondmost senior job in the Treasury.
Matt Hancock moves from the Business Department to become minister for the Cabinet Office and Paymaster General, with responsibility for efficiency and civil service reform.
Iain Duncan Smith is to remain in charge of the Government’s controversial welfare reforms as Work and Pensions Secretary.
The former party leader is one of a number of senior figures keeping their jobs, including Chancellor George Osborne, Home Secretary Theresa May, Foreign Secretary Philip Hammond, Education Secretary Nicky Morgan and Defence Secretary Michael Fallon.
It has already been announced that Michael Gove is returning to the top of government – moving from chief whip to Lord Chancellor and Justice Secretary at the expense of Chris Grayling, who becomes Leader of the House of Commons.
Mark Harper, who quit as immigration minister over the work status of his cleaner, takes over from Mr Gove as chief whip.
Robert Halfon, who was the Chancellor’s parliamentary private secretary (PPS) in the last parliament, has been appointed deputy chairman of the Conservative Party.