UK general election timing remains firmly in Prime Minister Andy Burnham’s hands under the Dissolution and Calling of Parliament Act 2022, with the latest possible date set for August 2029. Traders assign low odds to an announcement before mid-2027 because Burnham took office only in July 2026 after Keir Starmer’s resignation amid Labour’s heavy losses in the May local elections and Reform UK advances. The new leadership has shown no urgency to seek a fresh mandate, preferring to stabilize the party and pursue its agenda amid steady but not dominant poll numbers. Key near-term catalysts include any sharp deterioration in economic data, major policy setbacks, or shifts in opposition strength that could prompt a strategic early dissolution, while the absence of fixed-term constraints keeps the market sensitive to sudden political developments.