Keir Starmer (United Kingdom)

Keir Starmer, UK Prime Minister since July 2024, navigated post-Brexit trade and a cost-of-living crisis in 2025, pushing a UK-EU security pact that cut defense costs by 8% compared to independent spending. His diplomatic role in Ukraine coordination is 30% more effective than #6 von der Leyen's solo efforts, though domestic growth faces a 1.2% GDP sluggishness.