I’m going to treat it like an old riddle from 321

Hm 🚪 was the clue you were given, a door can be a method of going in or out of a room, a place, or a building. A building is built from bricks and mortar, wood, or metal. If you put metal on something it’s been Galvanised. Galvanised starts with a G. Add the G to the end of Hm and you get HMG. HMG is often known for meaning Her Majesty's Government, and to serve at Her Majesty’s Pleasure. Which you do in Prison, that’s right, someone’s off to the nick!

Posted By: Bungle, Oct 8, 17:58:15