Britain’s Prime Minister Keir Starmer could face a leadership challenge after local elections on May 7. The odds of him being out by December 31, 2026, currently sit at 68.5% YES, up from 66% a day ago.
The June 30, 2026 market now sits at 39.5% YES, down from 41% yesterday. The largest single move in the last 24 hours was a 3-point spike at 4:07 PM, suggesting traders are reacting to short-term developments around the leadership question.
The term structure shows a 29-point jump from the June 30, 2026, market to December 31, 2026. Traders appear to anticipate a catalyst in the second half of the year. With 251 days to the December resolution, the gap implies that whatever triggers Starmer’s departure, most bettors don’t expect it before summer.
Combined daily volume across both markets is $29,563 in actual USDC. But it only takes $998 to move the June market 5 percentage points, meaning a single large order could shift short-term pricing. The December market is thicker, requiring $5,843 for a similar move, which points to stronger conviction on the longer timeframe.
The speculation about Starmer’s future could be noise unless a clear leadership challenge emerges. At 40¢, a YES share for June pays $1 if he leaves by then, a 2.5x return. For that bet to make sense, you’d need to believe a leadership contest is imminent after the May elections.
Watch for announcements from Labour’s NEC, potential leadership bids by Angela Rayner or Wes Streeting, and shifts in public support or opinion polls. These would be the clearest signals for traders.
