At Thruxton. 23 years old. With solo gliding experience. First flight in Jackeroo 20.15 on 27/7/1964. First solo at 12.40. on 30/7.
Airtest passed, landed 19.15 on 21/8/1964. All exams passed during that time. Then 20 minutes to complete the required hours.
No radio, and it was 30 hours for an intensive PPL then. Thruxton was a busy no-control airfield in busy airspace. No electrics, no brakes. Taildragger. Excellent instruction - on one lesson, when the instructor didn't see progress, he cut the lesson and passed me to someone who could fix the problem.
1 hour 20 to convert to a Chipmunk at Perth in January 1965, with only gliders in between, so not a poorly trained pilot.
BUT: Fewer exams then, and I did it immediately after an intense 3 week Zoology course at what was becoming Strathclyde University, 2 years after a University degree and postgraduate diploma.
The study for the PPL exams may be very easy depending on your recent experience. And age makes a difference.