Hi - thanks for your reply! Can you see these pics?!
https://www.amazon.co.uk/clouddrive/...pZWHTf40LYeSIE
https://www.amazon.co.uk/clouddrive/...l5gMWWMmHOZkqB
https://www.amazon.co.uk/clouddrive/...W1HVZGmPxEhYHD
His cite certificate says his country of origin is Turkey - I do not know if this is because he's a sub-species that's native to Turkey, or if he was bred there, but it concurs with my amateur desk-based photo research that he's Testudo (graeca) ibera. That's what his shell looks like to me, anyway.
But I have NO CLUE so it would be great if you could help. If you can see his nursery home in the last pic, it's big enough for now but not a longterm solution so I want to start planning for the next step.
(I know those pellets are frowned upon here but he was raised on them and seems to love them - he buries himself right into them... However, at cage clean I'll topsoil the lot)