Back in the 80s and 90s the BAA used to publish a pocket timetable which was available by subscription. It was also possible to buy airport schedules of movements at most UK airports for the summer season at least.
I kept my copies for years until one day I thought they'd be of no value and I put them in the recycling!
I wonder if any one still has copies of these schedules to hand as a friend of mine is keen to simulate the movements at LGW in this period.
If you have copies and you're willing to copy or send onto my friend perhaps you could kindly get in touch.