I have a Irvin jacket named to a “P/O Harry Hirst.
Harry flew Mosquitoes with 23 Squadron from Little Snoring in Norfolk and went on to join BEA after the war, becoming head of training at the College of Air Training at Hamble, the BEA and BOAC Training College.
I have been unable to find out much about him at all apart from that, I assume he could be Harold? Harry being a shortened version?
I can send you the pics of the jacket as well if you need any.
To be continued…