Just to answer my own post, this picture appears here where they suggest it is N3295 of 222 Sqn.http://ww2talk.com/forums/topic/25035-dunkirk-operation-dynamo-evacuation-beaches/page-8
And also discussed on this forum http://forum.keypublishing.com/showthread.php?87258-Spitfire-Mk-I-II-and-IIa-s-Prop-fittings

Richard