The Percival Provost design was attributed to Henry Millicer when he worked for them prior to 1950 when he migrated to Australia.
He was a Pole who had flown against the Germans in 1939 and was awarded the Polish Air Force Cross. The defeat of Poland saw him make his way to England where he flew bombers in the RAF.
His Airtourer design came about as the result of an international competition sponsored by the Royal Aero Club to find a suitable replacement for the DHC-1 Chipmunk.
A tough call.
In any case, he won the competition (which had attracted more than 100 entries) hands down and so the Victa Airtourer was born.
A descendant of that aircraft is the New Zealand developed and built PAC CT4 Airtrainer.
I was privileged to attend a lecture given by him in Melbourne some years ago. He impressed all of us as a man of profound intelligence, experience, insight and wisdom.
Sadly, he passed away in 1996 at the age of 81.
Vale Henryk.