Thanks to help from www.RMweb.co.uk for help with this slide.
This is one of those photos that deserves a closer look. An unidentified but named class 47 in early Intercity livery. Can't quite make out the name. The train is interesting Mk2 aircons with a MK3 buffet car in the formation and at the rear not one but two Mk3 DVT's!

The location is just outside Chacewater in Cornwall and can clearly identified with help from Google Street view using this link http://g.co/maps/8xchv
The loco is 47613 'North Star' and is returning east with a SO Penzance to Birmingham working.
Photographer and date taken unknown.