I was brought up in Eastcote, and went to school in Harrow. Consequently saw a lot of the Northolt circuit and aircraft approaching Heathrow. Dad worked for a firm on Poyle Trading Estate in Colnbrook, so a treat on the Saturday mornings that he went in for sales meetings was to go and sit outside the factory (Sprung Slumber) and watch the whole range of piston engined airliners approaching HR. I guess over Colnbrook they were between 300 and 500ft. I can still sense the vibration in my stomach from those wonderful piston engines.