TfL announces 4G for Jubilee line

Transport for London has announced its trial of a new 4G mobile network along the Jubilee Line between Canning Town and Westminster stations will go live on 18th March 2020.
The current trial will initially cover the eastern section of the Jubilee line, extending to the whole line by the end of 2020. TfL aims to rollout 4G across the whole of London Underground by the mid-2020s, with a concessionaire agreement expected to be announced in mid 2020.
This is not the first deployment in London’s transport system. 260 London underground stations already have connectivity via a Virgin Media WiFi deployment and 79 London overground stations are served by Sky (The Cloud).