Well 05 was in use up to 1977 cos I landed on it returning from my honeymoon -into a ferocious sbowstorm. Trident 3 with a really strange approach sort of circling over the top of the airport and then heading back south.
I also watched the BOAC 707 approach in flames in the incident referred to earleir-made a big impression on a 15 yo to say the least .
As Heathrow Director said there were some interesting times if you lived near LHR back then with the big pistons belching flames from the radial exhausts on dusk or nightime departures -I lived almost under the old 23R /05l and had fantastic landing and TO views as a result
PB