Thanks for that nostalgia when I was a kid - late 50s - Dad worked for a firm based at Colnbrook, between Slough and Heathrow. Saturday mornings he often had to go to the factory for a sales meeting - and I would go with him in the Ford Popular we had then, and spend the morning standing outside the office watching, smelling and hearing a succession of piston engined airliners on final approach at some fairly low height. Brilliant