For months, Oleksandr Kamyshin led Ukraine's push to increase its production of drones, one of its most important weapons in the fight against Vladimir Putin's invasion.Used to strike Moscow's forces across Ukraine – and into Russia – Mr Kamyshin was at the forefront of upping the supply of drones in his role as minister for strategic industries and so strengthening Kyiv’s arsenal.

Ukraine struck the Moscow region on Tuesday in its biggest drone attack so far on the Russian capital, killing at least one woman, wrecking dozens of homes and forcing around 50 flights to be diverted from airports around Moscow.