Thank you all, especially horselydown86, stanmapstone and ainslie - the images and your explanations are really helpful. My husband will be interested too, but for me it was a case of accurately labelling the photos. The man was my father, Frank aka Brewin (hence 'brewins girl) and there's another one with my mother standing alongside it, where the registration is visible. My dad was teaching her to drive.
Your comment about starting handles reminded me how old I am mazi!