Andy Burnham is set to embark on a comprehensive reform of the UK government’s executive machinery soon after officially becoming Labour leader. Central to his plan is a substantial reorganisation of No 10 Downing Street aimed at enhancing governmental effectiveness and policy delivery.

The blueprint for these changes originates from a report commissioned by the Future Governance Forum and led by James Purnell, a former Labour cabinet minister and key figure in the incoming prime minister’s team. In a session held in June 2025 with former officials from the Blair and Brown administrations, Purnell sought to identify structural weaknesses within Downing Street. The consensus was that the existing organisational setup failed to adequately support the prime minister in driving government priorities.

The report proposed the creation of a new executive department dedicated to the prime minister, dividing Downing Street into four principal units: a “politics and strategy group” targeting political and long-term planning, a “policy and delivery group” to oversee progress across Whitehall, a “diplomacy and security group” to handle international affairs, and the traditional private office. It also recommended that the chief secretary to the Treasury report directly to the prime minister as well as to the chancellor, granting Downing Street greater influence over spending decisions.

These recommendations were initially presented to Labour leader Keir Starmer and his chief of staff Morgan McSweeney in August 2025 but were not pursued, due to perceptions of excessive complexity. With Burnham’s ascent to leadership, Purnell is now poised to implement the reform agenda as his chief of staff. The new administration plans to expand the Downing Street operation both in London and through a new office established in northern England.

While Burnham has expressed a commitment to devolving powers outside the centre, he is simultaneously determined to assert stronger central control over government functions. A key focus is reducing interdepartmental turf wars and curtailing Treasury micromanagement, which have hindered previous Labour governments. Burnham intends to hold ministers accountable through clear, written directives outlining his priorities and performance targets, reviving a culture of frequent progress reviews reminiscent of the Blair era.

Sources within Burnham’s team indicate that his initial speech’s firm message—that the government’s political direction “is not up for negotiation”—was aimed at ensuring unified commitment from both cabinet members and Labour MPs.

Burnham enters leadership with considerable authority, having secured swift and overwhelming support within the party. Allies describe his position as one of maximum political leverage, unencumbered by prior commitments, which is expected to facilitate smooth cabinet formation and policy rollout.

The civil service appears broadly supportive of the overhaul. Antonia Romeo, the cabinet secretary, reportedly welcomes the opportunity to implement significant reforms long deemed necessary. Within Whitehall, officials express cautious optimism, anticipating improved clarity and decisive leadership from a prime minister focused on managerial competence.

Burnham’s leadership will be formally confirmed at the Trades Union Congress in London this week, marking the start of a new phase in government designed to address longstanding operational challenges at Downing Street and beyond.