My Great Uncle Bert Dunleavy was, it seems, something of an amateur thespian, and I have just come across some papers relating to this.
The photo, printed on a postcard, appears to be taken at the back of the Church Institute, which was then very new, as you can see from the brickwork. On the right you can see the Wesleyan Chapel and the Science & Art Institute in the background.
This is the cast of a play called "Life's Stepping Stones" written by a man called F E Archer Smith who also acted in the play and appears to have operated his own amateur dramatic company in North Bucks.
The programme is reproduced below.