Who’s Retiring?

I am guessing it is a retirement because of the clock, but who, where and when. We are told by George Tremain: “The man on the far right at back wearing glasses is Stanley George Agar. He was the cousin of my father Claude Tremain.” Whilst Norman Patton has advised the Archive: “Eighth from the left, at the back, is ‘Tie Pin’ Ted Winspear who was one of the Liverton Mines Winspear family!”
Image courtesy of Colin Hart, thanks to George Tremain and Norman Patton for the updates.