In my regular experience some up Penzance/Paddington HSTs▸ now regularly struggle to keep to the timetable between Penzance and Plymouth because of overcrowding most notably the 0844 and 1000 HSTs from Penzance to Paddington.Both trains regularly needing 5 or 10 minutes more than the current timetable allows to reach Plymouth.In the summer timetable not surprisingly even more trains are effected by this problem so FGW▸ really needs to amend the timetable in Cornwall to reflect train running reality.
I seem to recall your constant posts about people not using trains from Cornwall to London because it takes to long.........
Ah but you forget, everybody gets off at Plymouth, apparently...
Perhaps they are all transfering to Plymouth airport for onwards travel to the outskirts of London