The Tube (London Underground)

A passenger alarm brings Victoria Station to a standstill.

Midnight repairs are the necessity against the flood of people throughout the day, but what's the cost of going into the underground?

In 2001 more than 50 people threw themselves under tube trains. The staff at the London Underground call it a 'one-under,' and they have to deal with the fallout.

There are technical issues on the District Line adding to the pressure of an already busy day. Meanwhile, at the London Bridge, things are ominously quiet.

Passing a red light might not be a big issue for this train driver, but in the event of an emergency, this one mistake could take lives.

The underground network is in the grip of a heatwave and with the average temperature on the tube being 10 degrees higher than outside, emergency services need to be called.