Thank you everyone for your kind and helpful replies.
GurKhan, thank you for the link. I believe you are right, they are Home Service helmets.
42flanker, He is now, I don't know what he was originally.
4DJones, thanks, that's a good point. Yes, I repainted him.
Eleve de Vauban, thank you. Having looked at their catalog I think I can make their Rorke's Drift 24th foot infantry, prone, firing work very nicely for my purposes. They start taking orders again in about a week.
Virtualscratchbuilder, thank you for the link. Yes, you're right about the similarities. Paint job is mine. I know many are keen on high quality paint jobs but I am going for mass-produced toy soldiers of my childhood feel and also a mishmash of brands, as was the case with me and all my friends as kids! For me, it's about nostalgia.
I am building a 4ft long, 3 tier Sudan display, a la Mignot dioramas.
Top shelf is forced perspective Camel Corps flying column, 15mm up to 60mm, all different makes.
Middle shelf is all 54mm, some camel corps and partial British square consisting of Camel corps, Highlanders and Sudanese troops, facing off against Fuzzy Wuzzies. Again, all different makes but British Bulldog is my favorite.
Bottom shelf is River Nile bank – palms, papyrus, crocodiles and hippos, all different makes, quite a lot of Britains.
I hope there's not too much disapproval over my repainting antiques, I know it is likely anathema to some collectors but I treat them as toys and personal property! I'm most of the way there but have some Fuzzy Wuzzies to repaint and the backgrounds to figure out. I have emailed Mignot to see if they'll sell me some of their desert palm tree wallpaper.
Thank you all again for your kind interest and help, I very much appreciate it.