Have you checked out arenapal (.) com? They've got a lot of photos I haven't seen before, if you use the search bar.
I’ve seen most of them before. But they keep adding new stuff every now and then, and I think they’ve added new things since last time I visited! There is at least some I can’t recall seeing, including this of Glyn Kerslake:
And this of John Aron and Rosemary Ashe:
If anyone is photo hunting, have a look at the site! There’s a LOT of original and early cast photos there. They tend to do a bit of mislabeling, so don’t use actor credits there as your bible. But they’re good pointers, anyway.