It’s often just a way of informing cleaning staff what needs to be done without alerting the rest of the platformThe London UndergroundThe London Underground(Image: Martin Keene/PA Wire)

There’s always a sense of intrigue when we hear a tannoy announcement referring to a special code or phrase while we’re perusing a shop or waiting on a train platform. We may never truly understand what it signifies, but we can’t resist attempting to decipher the situation.

Despite the fact that most of the time it’s not as thrilling as we anticipate, for a brief moment we imagine that something dramatic is about to unfold around us. This seems to occur most frequently while waiting on a London Underground platform, and you could hear one on a tube running through Herts so it’s high time we unravelled these announcements.

As reported by MyLondon, it’s often simply a method of informing cleaning staff about their tasks without alarming the rest of the platform. And that’s perfectly reasonable, sometimes ignorance is bliss when it pertains to urine on the platform.

However, if you wish to make the most out of an unfortunate situation and impress your fellow passengers the next time you hear a Code 2, here is the comprehensive list of codes. Each number represents something different.

Another code you might hear less frequently is ‘Inspector Sands’. It indicates that a fire alarm has been activated.

From that point, staff have two minutes to reach the control room to verify if there is a fire, otherwise the station is automatically evacuated.