The UK warned Moscow it would defend NATO territory after reports that US intelligence briefed Poland on a possible Russian provocation designed to test alliance’s resolve. The warning came after The Telegraph and Polish outlet Onet reported that Washington had briefed Warsaw several times about a potential Russian operation on Polish soil. Sources close to Polish President Karol Nawrocki told Onet that Moscow has not yet made a final decision, but that possible scenarios could unfold within the coming months.JOIN US ON TELEGRAMFollow our coverage of the war on the @Kyivpost_official. Responding to the reports, a spokesperson for the British prime minister said the UK “stands ready to defend every inch of NATO territory.” “When Russian drones violated Polish skies, British Typhoon jets defended,” the spokesperson said, adding that Britain’s commitment to the security of its allies was “unwavering.” The statement referred to the UK’s participation in NATO’s Operation Eastern Sentry, launched after Russian drones violated Polish airspace in September 2025. RAF Typhoon fighter jets were deployed to help protect the alliance’s eastern flank following the breach. Russia’s possible test of NATO According to the reports, US intelligence has warned Polish officials that Russia could seek to stage an ambiguous “hybrid” operation against Poland or another NATO eastern-flank state. The goal, according to the reported assessments, would be to create political pressure inside the alliance, expose divisions over NATO’s collective defense commitments and force Western governments to reconsider military support for Ukraine.