Stagecoach has published its timetables for buses this autumn to Callywith College and Cornwall College (Pool, Rosewarne, St Austell and Duchy College at Stoke Climsland). Go Cornwall Bus, which presumably still has the contract for buses to Truro College and Penwith College, has not yet published its timetables.
The buses run from various locations across Cornwall and west Devon and Plymouth to those campuses in the morning and back in the afternoon on days when the colleges are open, but they are public services and other passengers can catch them if they wish.
The timetables for these services are now on the Timetables page of this website. The services to Truro and Penwith Colleges will be updated when those timetables are published.
Update
5 August 2026
I have now received an update regarding the Go Cornwall Bus services to Truro and Penwith Colleges. These will, from September 2026, no longer be run as public services open to anyone to use them; instead they will all be run as “closed” services for use only by college students with their college bus passes. Members of the public who may have found it convenient in the past to catch these services numbered 271-287 and 380-383 will find that they will no longer be allowed on them.