At Manning, we had a girl who could open any door in the school...with a hairpin! At lunchtimes, all the classroom doors were locked as we were supposed to be outside in the grounds,unless fourth form or above, when we were allowed to leave the site. If it was cold, we sometimes sneaked back inside. Side doors had to be left open for access to toilets.
Susan, bless her, would unlock our classroom door with a hairpin and we'd silently sneak in and sit on the floor at the back of the room, with our backs against the pipes which were never more than tepid but it was better than the s