RAF fighter jets are being sent to Poland to prevent another Russian incursion into Nato airspace.
The Typhoons will fly alongside Danish, French and German aircraft in the coming days as part of the Eastern Sentry mission to bolster Europe's defences.
It comes after 19 Russian drones flew unimpeded for more than 100 miles into Poland and headed for a Nato air force base before crashing to earth.
Four of the 19 devices were shot down in the first direct military engagement between Nato and Kremlin forces.
And there was a further breach over Romania on Saturday by Russia. The Typhoons will be flown from RAF Coningsby in Lincolnshire, supported by Voyager air-to-air refuelling aircraft.
