It has become customary for Budgets to unravel within 48 hours of being delivered. Rachel Reeves didn’t have much in the way of fiscal announcements to deliver on Wednesday, but even what she did have to say seems to be falling apart. It has since transpired that the Office for Budgetary Responsibility (OBR) did not take into account any risks from a transatlantic trade war when downgrading its growth forecast for 2025 from 2 per cent to 1 per cent.