It is on the agenda - there have been collapses of the digs in Wigmore Swallet which have prevented access. One of these has been sorted and a trip made to the streamway a while ago. I expect more clearing will be needed.
Depends if you consider using any of the artificial tunnels (3-9), (9-20) and (9-show cave exit) as cheating and how much cave diving you want to do. There are several ways into chamber 1 from the cliff face so you can do laps of these or you can do 9(2) top entrance and out through 9-1 to surface - this would only involve free-diving (or waiting for low water) 5 to 3.
It's more of a hypothetical list than a recommendation for a trip. It seems rather unlikely that there will be a one-way system instigated for social distancing...
But yes, please read the guidebook before attempting any of the more or less far fetched ideas posted here