John is on the right. William is 3rd from the left (or right) source
John Micklem is an amazing horse man. He is a rider, trainer of people and horses and finder of top horses for elite competition (eventing.) eg He found Biko for Karen O'Connor.
I came across him via Moulton college when i was training for BHS exams.
Shantie was his "nemesis".
I wrote "Learning the Language of Feel" about John's approach - published in 1998 Horse & Rider mag. See Writing about equines.
He in turn had been trained by Robert Hall. I had the privilege to meet Robert in-person and wrote Emperor's New Clothes about his methods.