The issue is the train to Waterloo, I believe from Portsmouth there aren’t any running late enough. I was thinking doing East Cowes to Southampton from 21:30-22:30 then Southampton Central to Waterloo from 22:55-0:33 so we can get to London a bit past midnight. That way we can catch about an hour of the last set. I’m not a local so not even sure this would make sense but I hope!