The long-range Russian drones come in swarms each night, buzzing over Ukraine by the hundreds, terrorizing the population and attacking targets from the industrial east to areas near its western border with Poland.

A Russian factory, described by its director as the world’s biggest maker of strike drones, has been shown on the Russian army’s TV channel with teenagers helping make kamikaze drones to attack Ukraine.

Russia unleashed one of its largest aerial assaults on Ukraine in recent months, only hours before the UK and Germany are to chair a meeting to discuss US President Donald Trump’s plans for NATO allies to provide Ukraine with weapons.