Tube 4G network expands to parts of the Northern line

Passengers on a London Underground train

(Picture: Alamy)

The roll-out of super-fast 4G mobile connectivity on the Tube has expanded to part of the Northern line.

Transport for London said its new 4G network had been switched on overnight between Archway and Kentish Town, including Tufnell Park station, on the High Barnet branch of the Northern line.