One of the 'interesting historical things' being the picture on page 15 of multiple black faces wedged into tiny booths whilst being looked down on by a single white male.
It looks for all the world like CATC spent the 1970s factory farming ethnic minorities.
Given the size of the photo library which one assumes NATS has at its disposal, to use that picture must rank as one of the worst pieces of judgement ever known to man.