I have a lot of projects already, so I regrettably sent it back to the seller.
However, as a silver lining, I went to a charity shop today, and found a Yashica 72E! A bit grubby, desperately in need of new light seals, but all seemingly working as it should. £2 changed hands, and it was mine!
I know it is probably a lesser camera than the Olympus, and the lens is a stop slower, but for the price I am very happy.