London Underground to get line-wide 4G coverage in 2020 The Jubilee line will be the first to enjoy internet connectivity inside the tunnels July 22, 2019 https://www.itpro.co.uk/network-int...erground-to-get-line-wide-4g-coverage-in-2020 TfL: 4G on Jubilee line tunnel section from March 2020
O2 signs agreement with Transport for London to deliver 4G to Jubilee Line December 19, 2019 https://www.neowin.net/news/o2-sign...port-for-london-to-deliver-4g-to-jubliee-line O2: O2 to help connect millions of commuters and concert-goers to 4G on the Underground
EE brings 4G connectivity to London Underground's Jubilee Line March 17, 2020 https://www.neowin.net/news/ee-brings-4g-connectivity-to-london-undergrounds-jubilee-line
London's Tube will offer full mobile coverage by the end of 2024 Tunnels will also be fitted with full-fiber cables for on street access. June 22, 2021 https://www.engadget.com/london-tube-full-mobile-coverage-104000309.html