Marie-France van Heel, Andy Burnham's wife of 26 years, is shaping up to be the most operationally active prime ministerial spouse since Sarah Brown — and possibly ever. She has hired a former special adviser to a cabinet member, stepped down as chief customer officer at Be.EV (an electric vehicle-charging network in Manchester) while retaining a board seat, and is already conducting bilateral meetings with the spouses of world leaders. This is not a profile story. It is an institutional one. The architecture matters. Van Heel travelled with Burnham to the UN General Assembly in New York, attending a lunch hosted by Melania Trump and holding separate meetings with Ukraine's first lady Olena Zelenska and Canada's Diana Fox Carney. The UK holds the G20 presidency next year and the G7 presidency the year after. Downing Street is positioning van Heel as part of Britain's diplomatic vanguard — a role with no constitutional basis, no salary, no official title, and no accountability structure. Her background is corporate, not political. Born in Roslyn, Pennsylvania, to Dutch parents, raised in the Netherlands and Belgium, she met Burnham at Cambridge. She spent years as a senior marketing executive before joining Be.EV. Plan International UK's chief executive Rose Caldwell praised her 'valuable insight and unwavering commitment' during her time as a trustee, citing her contribution to advancing equality for girls. She is now consulting with charities and leaders on where to direct her energy. The personal texture is vivid and well-documented. Burnham has publicly recalled van Heel texting him during interviews to 'ANSWER THE FING QUESTION'. When he told her he planned a third Labour leadership bid, she responded: 'They've told you twice. They don't want you. Why again?' Her 1992 appearance on Cilla Black's Blind Date — in which she smacked a Conservative party future marketing director with a cushion after he called her a 'fridge' — has resurfaced as character evidence. The structural question is whether Britain is creating a de facto political role with taxpayer-funded office support but zero formal accountability. Sarah Brown's own diaries noted there is 'no formal spouse job to step into, no permanent office, no salary, no allowance, no pre-set duties or official role, not even an official title.' Van Heel is operating inside that vacuum but with a professional political adviser and an explicit diplomatic remit. The gap between the informal framing and the operational reality is widening. Victoria Starmer, by comparison, continued her NHS occupational health work throughout her husband's tenure and maintained a low profile. Van Heel's approach is the opposite: she is attending Labour conference fringes, posing with party-affiliated groups, and being described by insiders as 'incredibly cool' and someone who 'just gets it.' The question is not whether she is capable — her corporate and charity record suggests she is — but who she is accountable to. The UK is drifting toward a soft institutionalisation of the spouse role without the debate that should precede it. If van Heel is conducting diplomatic meetings and championing causes with a political adviser and taxpayer-funded support, the public deserves clarity on mandate, scope, and oversight. The absence of a formal framework is not a feature — it is a governance gap that grows more consequential the more active the spouse becomes.