As I said in my post m8, the weather was atrocious.From early morning ( 1 am )it shut in with rain and from then on it was black overcast skies. I left Dunbar around 9.40-10 am and it hadnt cleared .It was a bit better when I got to Dalkeith , it got better the further west I travelled. Looking on your line of flight, I would guess your birds defo hit bad weather.