“Ukrainian military first shot down a Russian helicopter from the modern portable missile complex Britain Starstreak.” This is stated in the article Newspapers The Times.
In the video common in the network, it is clear that the high-speed Starstreak shell, striking three kinetic darts, breaks the Mi-28N into two parts over the eastern Lugansk region.
on frames can be seen how tungsten darts cut off the tail of the Russian helicopter.