Commuters on a southbound Victoria line service from Euston were left shocked this morning, as an additional pocket of standing room — known as 'the Middle of the Carriage' — was discovered on their train.
Mark Williams, 27, has been hailed as an unlikely hero after unbearable conditions led him to make the discovery.
"It was a normal journey, everyone all bunched up by the door, barely able to breathe," Williams said. "As is my usual routine, I began to pass out, except this time, when I came to, I'd stumbled into some kind of train Narnia."
It is thought that by Williams actually moving away from the door, an additional 20 people were able to board the train and get to work on time.
"I had never seen anything like it. Thank goodness for this brave man, venturing beyond where us average folk dare to," one fellow passenger said.
Details of the new-found space remain scarce, but one rumour suggests that it occupies "half the fucking train".
In related news, Crossrail bosses are said to be furious after the scheme's economic case has been left in tatters.
"Why are we paying £15bn for a new railway when everyone can fit on the one we've got?"