I'm happy to say that I have once again been able to re-date the Polish tourist attraction I was unable to get a refund for, this time until October. When that time approaches I'll see if I can put it out again. Unusual but I'm not complaining.
There was also the accommodation I'd booked in Reims that was non-refundable, though they let me re-date. I'm happy to say though, that after a bit of toing and froing, and bearing in mind the continued uncertainty with Covid, they agreed to refund the cost. The change in exchange rate from almost 2 years back, has meant I lost about two quid on the deal but that's better than the fifty odd I was looking at.
All in all, not a bad result. Roll on 2023.