Sorry for late reply.
No, I have no other information although still confused by the timetable saying 09.32 and the tickets saying 09.57....
We're on the 16.30 to Stansted.
My booking - which according to an Italian on TripAdvisor says is 'guaranteed' says 09.57 - not 09.32......think I might get to the station in time for the earlier one....somewhat confusing
Following is posted by an Italian on TripAdvisor which refers specifically to trains to Pisa but might also help generally……
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Difficult to say about the trains. Usually Regional trains are cancelled except specified guaranteed trains, but there appear to be no guaranteed Regional trains...