With up to 400 trains a day running on its 62 miles of track, the channel tunnel is the busiest railway system in the world - and doing things at the double is key to its success. Show more
Discover 11,128,835 listings and 279,600 playable programmes from the BBC
With up to 400 trains a day running on its 62 miles of track, the channel tunnel is the busiest railway system in the world - and doing things at the double is key to its success. Show more