Which London tube line is mouldiest?

[John Ashworth]

Fungus foray: Which London tube line is mouldiest?

The Jubilee line is the youngest and smartest of all London Underground lines, but it is mouldier than the much older Central and Bakerloo lines...

The London Underground is also home to its own species of mosquito, the aptly named Culex molestus, which has evolved to be genetically separate from the species living on the surface.