Thank you Marsh Lane.
Must confess I had not heard of the David Heys collection until around 30 mins ago when I was searching info on 60s train formations and saw it referenced on one of the conversations somewhere else. I searched and was immediately disappointed to find it no longer seemed to exist, though some of the pics seem to have been posted on Pinterest. Then another search brought me here and lo such a wonderful source of information not to mention happy distractions.
Thanks again
Dave