Renewed speculation about a change of occupant at 10 Downing Street has thrust Andy Burnham's housing record back into the national conversation, with the Greater Manchester Mayor's brownfield-first development strategy and his repeated calls for rent controls now being examined as a potential template for national policy. For an audience of landlords, developers and institutional investors, the question is no longer academic: if Burnham's approach were to migrate from Greater Manchester's combined authority to Whitehall, the implications for yields, planning timelines and rental regulation across England would be substantial.