Andy Burnham took a major step toward potentially replacing Keir Starmer as Labour leader after securing a strong victory in the Makerfield by-election on Thursday night. The Greater Manchester mayor defeated Reform UK’s candidate by a thumping margin, 54.8% to 32%, winning by nearly 9,200 votes and securing his return to Parliament. The seat was deliberately vacated by a Labour MP to enable Burnham’s entry and leadership bid.
The win comes amid deep Labour unpopularity, with Starmer facing scandals, policy missteps and criticism over the country’s stagnant economy. 110 Labour MPs have already signed a letter demanding he step down. Burnham has openly discussed replacing Starmer, framing his campaign as a call for change that prioritizes neglected communities.
To trigger a formal contest, Burnham needs nominations from at least 81 Labour MPs, and Starmer has vowed to fight any challenge rather than step aside. Analysts note that while Burnham’s personal popularity helped locally, translating this into a swift national leadership victory remains uncertain.
Trade analysis
This short-dated binary is now driven by nomination thresholds and internal revolt momentum, and June 30 remains a rather tight timeline for a full ouster.
Bullish (YES) signals:
- Burnham securing 81+ MP nominations, possibly with Streeting coordination
- Further resignations or public MP defections
- Sustained market weakness such as gilts selloff and poor polling
Bearish (NO) signals:
- Burnham falling short of the 81-MP threshold in the short term
- Starmer securing enough loyalists to delay contest
- Procedural rules pushing any resolution beyond June
By-elections delivered headlines, but Labour leadership contests are lengthy processes involving nominations and member votes. Even with 110 MPs signaling discontent, hitting the threshold and completing the process by June 30 is a steep climb. YES may offer value on post-win dips below 25-30%, but fading extreme panic spikes into NO remains attractive. Our base case is heightened volatility and serious pressure on Starmer, yet survival past June 30.