In my early days as an RAF ATCO, Local was always provided with Pilots Notes for all the aircraft types on the station ... For the benefit if the Duty Pilot or any exec who might need to refer to them.
They made valuable reading, during quiet times, for ATCOs. It gave us a good idea of what was going on up there, particularly in the context of emergencies and what they might imply. Anyone recall "turret drive failure" on a Hunter? It didn't make us pilots, but it sure helped some of us Direct Entrants provide a better service.