I remember looking over an HP42 at Croydon Airport as a little fellah, though I never flew in one.
From where I lived you could hear them warming up the engines for ages before they took off and climbed out, normally going over our house.
The majority of the flights were with DC2' & 3's and a few DH82 Dragon Rapides.
In those days they flew direct London to Paris etc: I'm told that when radar and flight corridors were introduced, if an aircraft went missing, it narrowed down the area where they had to look for the broken bits. Probably not true, but that was the story going around at the time.
I remember Croydon well, and as a kid when they had an open-day was talked into doing a simulated parachute jump off the top of a hangar where a tough-looking soldier controlled the brake of the fixed line after I jumped. When I got home my Dad asked me how my underpants were?