Hey yes had it confirmed as a 700c: 700 x 25c (25-622)
I think she’ll just want a straight up replacement. I’ll put up a wanted ad. If no one comes up with anything, can I just buy a modern 700c road wheel. I imagine I need to be wary of how the cassette attaches to the hub? Gears aren’t my area!
Thanks for your help. Very grateful.