Following the UK’s confirmation that Alexei Navalny was poisoned with epibatidine, a toxin derived from poison dart frogs, the situation has escalated significantly. The UK Foreign Secretary Yvette Cooper has stated that the UK is considering coordinated action, including increasing sanctions against Russia, labeling the claims against the Kremlin as 'deeply serious' (The Guardian, February 15, 2026). This follows a joint announcement from Britain, France, Germany, Sweden, and the Netherlands, which concluded that Navalny's death was likely orchestrated by the Russian state. The UK is pushing for action, with Cooper emphasizing the need for a united front against such aggression (BBC News, February 15, 2026).