The prime minister said the “most important thing” to recognize in the wake of the attack is that Ukraine is being forced to use missiles to “defend its homeland”. “It has to defend its homeland against an illegal and barbaric set of strikes by Russia,” he told the G20 summit in Bali. Earlier on Tuesday, US officials said it appeared the missile was fired by Ukrainian forces at an incoming Russian missile before hitting Poland. Joe Biden, the US president, made a similar point in brief comments to the press at the G20 summit when he said it was “unlikely” the missile was launched by Russia. Mr Sunak added that it was important to “calmly ascertain exactly what happened” in Poland, but to focus on Russia’s “continued barbaric activity of bombing the Ukrainian people in their political infrastructure”.