Rachel Reeves has broken cover. In her first major public intervention since Andy Burnham sacked her as chancellor, she has used a Sunday Times article to declare that Brexit has made Britain "poorer, weaker and less secure" and to endorse Burnham's leadership on reopening the European question. The significance is not in the sentiment — Reeves says no one in the Treasury doubted her pro-European instincts — but in the timing and the framing. Burnham has laid out a two-stage approach. Stage one: extract whatever gains can be negotiated within Labour's 2024 manifesto commitments — no customs union, no single market, no freedom of movement. This kicks off at the EU summit later this month, targeting eased trading restrictions and a youth mobility deal. Stage two: everything bigger waits until after the next election, with Burnham arguing that single market re-entry could be manifesto-pledged without a referendum, while full EU rejoin would require another in-out vote. Reeves' intervention matters because it reveals the internal pressure lines. At his last cabinet meeting, Burnham explicitly warned ministers not to freelance on Brexit positioning. Reports indicate Home Secretary Shabana Mahmood has concerns about migration implications of any revised deal. Reeves, no longer bound by cabinet discipline, is doing exactly what Burnham told sitting ministers not to do — and she's doing it with a directional push that aligns with Burnham's own instincts rather than contradicting them. The substantive argument Reeves made as chancellor — most clearly in her March 2026 Mais lecture — was that Brexit created "profound uncertainty, raised new barriers to trade" and left Britain at risk of being "stranded between powerful trading blocs, as globalisation retreats." That diagnosis has not changed. What has changed is that a former chancellor is now publicly framing re-entry as the logical conclusion, not just damage mitigation. The political architecture here is deliberate. Burnham maintains the careful two-stage framework. Reeves, freed from office, makes the emotional and economic case for the destination. Cabinet ministers stay quiet. The effect is a coordinated Overton window shift: the question moves from "should we discuss Brexit's damage" to "how fast do we move back toward Europe" without the PM himself having to break his manifesto commitments before the summit. The risks are real. Migration remains politically radioactive, and any freedom-of-movement discussion will be weaponised by the opposition. Mahmood's reported concerns reflect genuine electoral vulnerability in seats where immigration drove the Leave vote. Burnham's insistence that full rejoin requires a referendum is a pressure valve — but the single-market-via-manifesto path still exposes Labour to charges of backdoor rejoin without public consent. What this does not yet have is a compelling answer to the constituency that voted Leave. Reeves says it is "incumbent on supporters of our re-entry to make the argument, demonstrate tangible benefits and to get the next steps right." That is correct as strategy and empty as substance. The generative case for re-entry — specific sectors, specific gains, specific jobs — has not yet been made in terms that resonate outside Westminster. Until it is, this remains an elite consensus looking for popular permission.