Prime Minister Andy Burnham has repeatedly ruled out a snap UK general election, insisting the next vote will occur in 2029 and dismissing advisor-driven speculation about a spring 2027 contest. Parliament sits until at least July 2029 under the five-year term, with the legal deadline falling in mid-August that year, though the prime minister holds the power to request dissolution earlier. Recent polling shows Labour ahead of Reform UK but short of a majority in a hypothetical early ballot, amid a modest "Burnham bounce" following his July 2026 leadership transition. Traders are watching the October 2026 Holborn and St Pancras by-election and any shifts in Reform's standing or Labour's delivery on manifesto pledges as potential catalysts that could alter the low implied odds of a call before mid-2027.