Hi All,
Sorry if this has been posted before, but this is a 22-minute-plus film of Southern Railway freight operations after dieselisation:

http://www.youtube.com/watch?v=oyVfXtrylqs

The Youtube posting is poor quality and there are breaks in it but it is worth the viewing. The film is included in a Clear Block DVD, Vignettes of the SOUTHERN RAILWAY - Volume 1:

http://www.clearblockdvd.com/vignettes-of-the-santa-fe--volume-1.html

Enjoy!
Best regards,
Martin Skrzetuszewski