Sterling plunged sharply today while UK bond yields surged above 5.1% after the first ministerial resignation calling for Prime Minister Keir Starmer to step down transformed simmering political anxiety into something much more dangerous for markets: the perception that Britain may now be drifting toward a “zombie government.”
The trigger came shortly after 9:15 a.m. London time when junior minister Miatta Fahnbulleh announced her resignation and publicly urged Starmer to “do the right thing for the country and the Party and set a timetable for an orderly transition.” Markets had already been increasingly nervous following Labour’s disastrous local election results last week. But Fahnbulleh’s resignation suddenly made the leadership crisis feel real rather than theoretical.
The political arithmetic has also deteriorated rapidly. Reports now indicate that more than 80 Labour MPs — roughly one-fifth to one-quarter of the Parliamentary Labour Party — have either privately or publicly demanded that Starmer resign immediately or commit to a timetable for departure by September. The situation intensified after Catherine West revealed she had received overwhelming encouragement for a potential leadership transition.
For traders, 80 MPs is not just another headline number. It represents a psychological tipping point. Under Labour Party norms, a prime minister whose authority is widely seen as “fatally wounded” often struggles to regain control once coordinated resignation pressure begins building internally.
Markets are now increasingly pricing a full leadership contest as effectively inevitable.
The problem for investors is not simply who replaces Starmer. The deeper fear is that Britain may temporarily end up with a government too politically weakened to respond coherently to mounting economic challenges. Rising oil prices linked to the Iran conflict, elevated borrowing costs, and growing fiscal pressures are all hitting simultaneously while Labour increasingly appears consumed by internal survival battles.
That concern was visible immediately in markets. Sterling sold off aggressively while the 10-year gilt yield surged back above 5.1%, suggesting investors are demanding a growing political risk premium to hold UK assets. Importantly, the simultaneous fall in Sterling and rise in yields signals markets are not merely reacting to global macro conditions, but specifically reassessing confidence in Britain’s political management capacity.
Technically, EUR/GBP’s breakout above 0.8676 confirms that fall from 0.8740 likely ended at 0.8618. Just as importantly, the repeated defense of 38.2% retracement of 0.8821 to 0.8863 at 0.8618 continues preserving the broader medium-term bullish structure in the pair.
The next upside target now sits at 0.8740 resistance. A decisive break above that level could open the way toward a retest of 0.8863, the 2025 high.
