Old-fashioned detective work and a golden bell: Inside the hunt for British Museum’s missing treasures

Deep inside the labyrinth of corridors at the British Museum, once every so often, the ringing of a school bell can be made out.

Its clattering noise can send new employees skidding down between offices in search of the commotion, but for those accustomed to the quirks within the institution’s four walls, the ritual is a well-known celebration.