Hi Mike,
Sorry for the tardy reply. We’ve been away for several days.
You ask about Short Period Stars and I can confirm that the VSS has no official RR Lyr or Delta Sct programmes as I’m sure you’ve noticed. However, as Jeremy points out, that doesn’t stop some of us observing such stars from time to time. Indeed, I’ve been following a number of HADS in a programme run by Patrick Wils:-https://docs.google.com/spreadsheets/d/1oGA2HaEHE8L6eX19ZoHqQQTu0LYV56HX3Srg7oCtOHo/edit?hl=en&pli=1#gid=5
I particularly like these stars because they are generally easy to observe (although quite frequently you need to find your own suitable comparison stars, but I can help you with that if necessary). They are also mostly quite bright and are great to observe when conditions don’t allow the observation of fainter objects.
If you wish, we can chat more about this via email (roger.pickard@sky.com)
Cheers,
Roger