You can Bank on mobile phone coverage on the London Underground

Bank tube station has become the latest station to join the expanding mobile phone coverage on the London Underground.Within the station, the Central line platforms, passageways, and escalators leading to and from the main ticket hall now have mobile coverage. Later this year, coverage will also be extended to the platforms of the Northern line when the City branch of the Northern line is also covered for the first time.
Work will soon start to add mobile phone coverage to the Waterloo & Cit