Haraka, we still had the old Z-harness up until the time I left ULAS in 1973. I'm fairly sure that WK518 had the 5-point harness when I did that brief spell of air cadet flying though.
I can't recall which type of parachute was in use in 1979 though.
I was once given a lift back from the launch point to the hangars in a Tiger Moth. The pilot just said "Hop in the back, I'll take you over to the hangar" - so I did. Whereupon he took off - I'd assumed we'd taxi back as the Tiger was always flown solo from the rear seat. That's when I learned how to strap in to a Sutton harness....quickly! No parachute, of course - just a cushion.