Yesterday concrete accidentally leaked into the control room of the Victoria Line, leaving tens of thousands of rush-hour commuters trying to find another route home.

Nigel Holness, Operations Director for London Underground, said that contractors had been working in an area next to the Victorial line signal control room. He said: "These works involved the use of water and cement which leaked into the room, damaging equipment." 

Since then the layer of cement has been removed and the line is now fully functioning. But questions will be asked, I'm sure, as to how contractors managed to make the mistake.

The Guardian covered the story and asked people what mistakes they'd made at work. Here are some of the responses:

And my personal favourite:

Read the full story at The Guardian.