Aye Up Awarner,
Well spotted and great shot, especially with a mobi.
I wonder if the size of the moth took you by surprise or had you seen them before?
I once saw a large Deaths Head Hawk Moth fly in through a barrack room window late one evening during the hot summer of 1976 immediately followed by what must have been the fastest turn out of squaddies onto the parade square in history!
No joking - the body was the size of a packet of Polos and it had the wing span of a sparrow!
I still don't know whether they are dangerous, they certainly look it!