This says room 5 on the door and is taken from the corridor near to stairs - S3. Before 1935 when the school was extended this was the Girls' Cloak Room. The new sign on the doors says: 'Years 10 &11 Directors of Study'. It has another small room within it and an inter-connecting door. The second room also has a door onto the lobby at the old main entrance E1. Security appears to be important - see the coded door lock and steel guard along top of door frame.
Photo from John Simpson - taken just before school closes for the last time.