Hi Brian,
Re: De Mestre.
Whilst you have your copy of Larry Donnelly's, "The Other Few" handy, check out p.102 (No.61 Sqn Hampden P2089). One of the crew is named as; Sergeant J I DOYLE. A description of the events on this night (19/20 August, 1940), can be found here:
https://www.thegazette.co.uk/London/...4951/page/5654 (see also p.5655).
Col.