Can you see enough detail on the Pullmans to spot either: no underframe trusses, and/or panel joins running across the roofs, these are characteristics of the old unlit Pullmans which are models of the Queen of Scots cars; or alternatively underframe trusses, and/or smooth roofs with a long single rainstrip, and/or matchboarding below the windows, or any kitchen cars, these are only found with the Southern allocated K cars, which are the more recent models which have lighting.