The briefing war over the Treasury has consumed Westminster for weeks, Ed Miliband's supporters and Andy Burnham's allies trading claims about market credibility and political baggage as though the chancellorship were the only appointment that mattered. Buried in the reporting on that contest is a shorter, quieter line: Wes Streeting was originally slated for the Foreign Office, was considered for the Treasury, and is now expected to be handed "another senior brief". What that means for Health has gone almost entirely unremarked.

It should not. Streeting has spent two years as the most consequential health secretary in a generation, not because every decision he made was right but because he made so many of them, at speed, and staked his political identity on delivering them. The abolition of NHS England and the reabsorption of its functions into the department was his call. The Federated Data Platform, procured through Palantir and defended against sustained criticism from clinicians and privacy campaigners alike, was his contract to own. The consolidation of integrated care boards from 42 down to 26 was implemented on his watch and under his political cover. Sir Jim Mackey's accountability drive, the renewed pressure on trusts to hit financial control totals, the entire architecture of centralisation after a decade of devolved failure, all of it carries his signature.

A change of secretary of state at this point in the cycle is not like a change of secretary of state at the start of a parliament, when a new minister can plausibly reset priorities and claim a mandate for a fresh direction. This is a shift in the delivery phase, where the challenging part, which is actually bringing ICBs together in a sensible manner, making the data platform functional, and convincing trusts that centralisation is far more than just a catchphrase is still ongoing. A successor inherits programmes designed around Streeting's judgement calls and his relationships with NHS leadership, without either.

The timing compounds the risk. Burnham enters Downing Street on 20 July, a date chosen deliberately to fall after the World Cup final and, more consequentially, after the Commons has risen for recess. He will not face MPs until the autumn. The Conservatives had planned to use their opposition day to force a debate that would have obliged him to take questions on his first afternoon in office; the government has cancelled that day in favour of a debate on Iran. Whatever the merits of that substitution, the practical effect is that a new government, quite possibly with a new health secretary, will operate for several months without the ordinary parliamentary friction that keeps departmental direction honest.

For NHS leaders this matters in concrete terms. Trust boards and ICB executives have spent the past year calibrating their behaviour to Mackey's centralised accountability regime and to the specific expectations Streeting's department has set around financial discipline and digital transformation. A new secretary of state, unfamiliar with the detail and untested by select committee scrutiny, creates exactly the kind of ambiguity that causes delivery to slow even when formal policy does not change. Life sciences investors and health-tech suppliers watching the Federated Data Platform rollout, or waiting on signals about NICE access reform, will read a change in personnel as a reason to pause rather than proceed.

None of this means the appointment will go badly. Streeting may simply move to a role that keeps him close to domestic policy, or Burnham may choose continuity precisely because he recognises the cost of disruption mid-reform. But the absence of scrutiny before autumn means that whichever choice is made will go unexamined by parliament for months, at the exact moment the NHS reform programme most needs someone who can explain, in detail and under pressure, why it is still worth pursuing.

That is the story hiding inside the chancellor briefing war. Westminster is arguing about who gets the Treasury. The NHS should be asking who gets Richmond House, and who will be there to answer for it when parliament finally returns.