Mig 21 in Scotland

Just received a call from a very credible source that he witnessed a MiG 21 tailchasing a Tornado on Monday 11th July at 16:45 BST

It was over Loch Tummel, crossing faskelly and they departed to the NW, Ben Vrakie….

Anyone any idea’s where it came from…??

Unfortunately, they were too fast for him to raise his camera!