I have not been able to get down to Cornwall of late but have seen the fun with the class 47 charters this past weekend.
One of the locos 47805 was once Cardiff Cantons 47257 which was quite common working down to Cornwall back in the 1970s.
I thought you may like this picture of 47257 passing Chacewater station, which was largely intact, on the down side on 25th May 1976 .
This was the 12.10 Penzance to Paddington service. I did print this one in my Plymouth to Penzance book.
The other loco on the weekend special 47593 was once 47272 a Scottish loco so far less common down west then 47257.
Good the weather was kind to you
Cheers, Roger Geach