Baffling coded announcements on transport systems often have us wondering what they really mean, and now we know.
Lists have been compiled and, rather appropriately, a call out for someone to deal with a "code two" on the Underground means it's time for some unlucky cleaner to fetch the bucket and wipe someone's toilet off the platform, seats or stairs.
The list doing the rounds right now contains a complete dictionary of Underground cleaning announcement codes, such as:
Code 5 - Broken Glass
Code 7 - Miscellaneous things or unidentified seepages.
So now you know and can be happy it's not your job to bring the wheelie bucket down the stairs.