Burnham ruled out a snap election; the next GE is not required until 2029.
Market resolves to YES if a UK general election is held, or a dissolution of Parliament for a general election is proclaimed, before 1 July 2027, following a request by Prime Minister Andy Burnham (or a successor Labour prime minister) to the King. A by-election, local election, Senedd or Holyrood election, or a confidence vote that does not lead to dissolution resolves NO. Source: royal proclamation / London Gazette / UK Parliament.