After Russian drones entered Polish airspace, two authors of the UK strategic defence review said Europe would need to build up its defences

Britain should work with Nato allies in developing an integrated air and missile defence system after the incursion of nearly 20 Russian drones into Poland, according to two authors of the UK strategic defence review.

Fiona Hill, a former White House adviser, said that Russia was “testing the limits” of Europe’s defences at a time when the military commitment of the US to Nato was uncertain.