By Mack Tubridy in Tbilisi Thousands of Ukrainian refugees are trying to make their way into the EU through border crossings in the Pskov and Leningrad regions following Moscow’s sham referenda in southeastern Ukraine and its announcement of a partial mobilisation. Many residents of the newly annexed Ukrainian territories have been forced to flee to Europe through Russia for fear of being further caught up in the Kremlin’s war of aggression. As the BBC’s Russian service reports, the unprecedented number of refugees trying to flee into Europe has led to a collapse at Russia’s borders with Eston…