What does the Downing Street chief of staff do?

The Downing Steet chief of staff is the UK prime minister’s most senior political adviser. Chiefs of staff are sometimes, but not always, political appointees, with close links to the political party of the government at the time.

The role is extremely influential. Chiefs of staff advise the prime minister on a wide range of issues, including government policy, party politics and communication strategies. The chief of staff would also normally oversee and manage Downing Street political staff and the work of special advisers across government.

However, the duties of the role vary considerably depending on the skills, previous experiences, and character of the prime minister and the chief of staff at the time. In an event with the Institute for Government, Lord Barwell, chief of staff under Theresa May, said that “by definition, there can’t be a job description”.

Nevertheless, Barwell did offer some unique insights into the nature of the job in his Ministers Reflect interview, laying out what he believes to be the six key aspects of the role:

  • Being the prime minister’s most senior political adviser
  • Managing other political advisers
  • Working closely with the prime minister’s principal private secretary
  • Working with the wider team of private secretaries to try to get the government machine to do what the prime minister wants
  • The gatekeeper role: sitting outside the prime minister’s office and controlling who gets in and who doesn’t
  • Brokering deals with other ministers

What is the difference between the principal private secretary to the prime minister and the chief of staff?

Whereas chiefs of staff are generally political appointees, the principal private secretary (PPS) to the prime minister is always a senior civil servant. The PPS heads the prime minister’s private office – which is made up of other civil servants – and manages the rest of the civil service team in No.10, whereas the chief of staff oversees the prime minister’s special advisers. Before Tony Blair re-introduced the Downing Street chief of staff , and granted the role greater powers over civil servants, the PPS to the prime minister was the most senior member of staff in No.10. Gordon Brown reversed Blair’s mandate that the chief of staff could formally direct civil servants, but the chief of staff remains a very influential role.

Most teams in No.10 have seen the chief of staff work very closely with the PPS. On the relationship between the two roles, Gavin Barwell told the Institute for Government that “you work really closely with the prime minister’s principal private secretary…to run the building. And I think that is about setting the tone”.

Who is the current chief of staff?

Steve Barclay was appointed Downing Street chief of staff on 5 February 2022. He has retained his ministerial role as chancellor of the duchy of Lancaster, minister for the cabinet office, and is MP for North East Cambridgeshire. This garnered considerable attention in the media and from the opposition, with questions raised as to how Barclay would find the time to fulfil all of the above roles.[1] Steve Barclay is the first sitting MP and current government minister to become Downing Street chief of staff.

How and when did the chief of staff role arise?

The ‘chief of staff’ title is originally a military term. In 1953, President Eisenhower became the first US president to appoint a political chief staff , and the role has continued in the US ever since.[2] Margaret Thatcher was the first UK prime minister to appoint a chief of staff – David Wolfson (later Lord Wolfson) – in 1979. Wolfson had been director of Great Universal Stores, and then secretary to the shadow cabinet, prior to his appointment. He was one of Thatcher’s closest aides, describing his job as “making her aware of the few things that mattered and to make sure she saw the right people at the right time.”[3] Wolfson left the role in 1985 and the position was left vacant.

Tony Blair re-introduced the chief of staff role to Downing Street when he became prime minister in 1997, appointing Jonathan Powell, who had previously worked as a senior diplomat.

Unlike political appointees before him, Powell was given unprecedented powers to issue orders to civil servants.[4] He wielded considerable influence during his 10 years, playing an important role in negotiating the peace process in Northern Ireland.[5]

Who else has been Downing Street chief of staff?

When Blair resigned, Powell stood down as chief of staff. Gordon Brown experimented with different models of the chief of staff role during his time as prime minister. First, he temporarily appointed civil servant Tom Scholar (later Sir Tom Scholar) as both Downing Street chief of staff and his principal private secretary, marking a move away from Blair’s introduction of a US-style chief of staff.

In January 2008, at the point of Scholar’s planned departure, senior civil servant Jeremy Heywood (later Lord Heywood) took on the principal private secretary role and Stephen Carter (later Lord Carter), formerly CEO of Ofcom, became chief of strategy and principal adviser to the prime minister – de facto chief of staff.[6] Carter had been a member of the Labour Party prior to taking up his position at Ofcom, and rejoined the party upon his appointment as chief of staff.[7]

Carter only stayed in the post until October 2008 and, although it is sometimes claimed that Heywood became chief of staff for the remainder of Brown’s premiership, he explained that this was not the case at an Institute for Government event. The position was left vacant until Gordon Brown left office.

When David Cameron became prime minister in 2010, he appointed Conservative adviser Edward Llewellyn (later Lord Llewllyn), who had worked for him in opposition, as his chief of staff. Llewellyn was part of a small team that negotiated a coalition deal with the Liberal Democrats.[8]

After David Cameron’s resignation, and Theresa May’s appointment as prime minister in 2016, Conservative special advisers Nick Timothy and Fiona Hill became joint chiefs of staff. While at No.10, they gained a reputation in the media and among staff as exerting a tight grip on power on May’s behalf.[9] When the Conservatives lost their majority in the 2017 general election, under pressure from the parliamentary party, they were replaced by former minister Gavin Barwell (later Lord Barwell).[10] Barwell has since written a book about his experience in No.10.[11]  

Boris Johnson did not appoint a formal chief of staff when he became prime minister in July 2019. However, Dominic Cummings, his chief adviser, was seen as his de facto chief of staff.[12] When Cummings left Downing Street amid internal turmoil in November 2020, Lord Udny-Lister – who had served as Johnson’s chief of staff when he was mayor of London – became the prime minister’s acting chief of staff, until Dan Rosenfield took over in January 2021.

Before becoming chief of staff, Rosenfield previously worked as a civil servant in the Treasury, acting as principal private secretary to chancellors of the exchequer Alistair Darling and George Osborne, and later as an investment banker. Despite his civil service background, Rosenfield was appointed politically as a special adviser by the prime minister. In February 2022, Rosenfield resigned, along with two other senior special advisers at No.10. In December 2021, it had been reported that Rosenfield had attended at least one of the Downing Street Christmas parties in December 2020.[13]


  1. Helm T, ‘Boris Johnson’s new aides are greeted with bafflement’, The Guardian, 5 February 2022, retrieved 7 February 2022, www.theguardian.com/politics/2022/feb/05/boris-johnsons-new-aides-are-greeted-with-bafflement; McGuinness A, ‘Questions raised over how Boris Johnson’s new chief of staff Stephen Barclay will mange three jobs at once’, Sky News, 6 February 2022, retrieved 7 February 2022, https://news.sky.com/story/questions-raised-over-how-boris-johnsons-new-chief-of-staff-stephen-barclay-will-manage-three-jobs-at-once-12534583; Topping S, ‘Angela Rayner labels new Number 10 appointment a ‘farce’ as she hits out at Boris Johnson’, Manchester Evening News, 5 February 2022, retrieved 7 February 2022,  www.manchestereveningnews.co.uk/news/greater-manchester-news/angela-rayner-labels-new-number-23000755
  2. Whipple C, The Gatekeepers: How the White House Chief of Staff Define Every Presidency, Crown Publishing Group, 2017.  
  3. The Times, ‘Lord Wolfson of Sunningdale obituary’, The Times, 12 March 2021, retrieved 7 February 2022, www.thetimes.co.uk/article/lord-wolfson-of-sunningdale-obituary-sczj79mm5.
  4. Assinder J, ‘Profile: Jonathan Powell’, BBC News, 14 July 2004, retrieved 7 February 2022, http://news.bbc.co.uk/1/hi/uk_politics/3893065.stm
  5. Ibid. 
  6. BBC News, ‘Brown appoints new chief of staff’, BBC News, 23 January 2008, retrieved 7 February 2022, http://news.bbc.co.uk/1/hi/uk_politics/7205248.stm
  7. Wintour P, ‘New strongman at No 10: Brown hires a high-flyer to help him back on course’, The Guardian, 8 January 2008, retrieved 7 February 2022, www.theguardian.com/politics/2008/jan/08/uk.gordonbrown
  8. Henry R, ‘Coalition talks continue in Westminster’, The Times, 9 May 2010, retrieved 7 February 2022, www.thetimes.co.uk/article/coalition-talks-continue-in-westminster-zb97dgtx3h0
  9. Elgot J and Mason R, ‘Nick Timothy and Fiona Hill: unelected advisers who ‘acted more like DPMs’’, The Guardian, 10 June 2017, retrieved 7 February 2022, www.theguardian.com/politics/2008/jan/08/uk.gordonbrown
  10. BBC News, ‘Nick Timothy and Fiona quite No 10 after election criticism’, BBC News, 10 June 2017, retrieved 7 February 2022, www.bbc.co.uk/news/uk-40231107
  11. Barwell G, Chief of Staff: Notes from Downing Street, Atlantic Books, main edition, 2021.
  12. Morrison G, ‘Key players in Boris Johnson’s election campaign: From Dominic Cummings to Isaac Levido and Lee Cain’, Evening Standard, 13 December 2019, retrieved 7 February 2022, www.standard.co.uk/news/politics/boris-johnson-election-campaign-key-players-a4312441.html
  13. Swinford S, Wright O, Zeffman H, Grylls G, ‘Christmas party row: Tories held ‘up to seven’ parties in lockdown’, The Times, 9 December 2021, retrieved 7 February 2022, www.thetimes.co.uk/article/no10-christmas-party-wine-gifts-quizzes-boris-johnson-allegra-stratton-vdbpghr52
Update date: 
Thursday, February 10, 2022

Original source – The Institute for Government

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