Herc' V Lightning
I heard this, all sounding the same, from several different people from very different squadrons; by all accounts, as I heard it, the chap was heading straight East over the 'Iron Curtain' - otherwise no real reason to shoot him down in a hurry was there ?
So, the Lightning's only kill was some nut in a blue on blue - though frankly seems justified given the ramifications.
Possibly the Mig's shooting at transports within the Berlin corridor earlier was relevant, but I'm only guessing.