Ukraine may be able to withstand the Russian invasion for “as long as we can supply them” with weaponry and “for as long as their morale holds up,” the former head of the UK’s Defence Intelligence has said. Air Marshal Philip Osborn said on March 20 that the Ukrainians have been “amazing” in their resistance so far. He told Sky News: “We need to bear in mind that they have been preparing for this. This, for most of the West started three weeks ago. For Ukraine, this started nearly a decade ago. They have had time to prepare and think. They have also got a strength of will and the application of good weaponry. “Frankly, I think they will hold out as long as we can supply them and for as long as their morale holds up, and those are two very easy things to say but really challenging to …