> Even down to the fact this event had a codename pre-planned in advance. "London Bridge has fallen".. just, why? This isn't James Bond. Theoretically, it's to

> Even down to the fact this event had a codename pre-planned in advance. "London Bridge has fallen".. just, why? This isn't James Bond. Theoretically, it's to avoid jumping the gun. It's embarrassing if someone hears "the Queen is dead" and rushes to trigger the various announcements. There's a lot of queens in the world and in fiction -- this might be an unlikely mixup, but it's probably still better avoided. That said, picking a phrase that's part of a well-known nursery rhyme probably didn't really help avoid that confusion.