London Underground uses a leaky feeder system for its internal communication network "Connect". However, the communication used by the emergency services, Airwave, was not compatible and did not work below ground. The fact that this situation continued to exist after the 1987 King's Cross fire was criticized in the reports from the 7 July 2005 London bombings, where it hampered rescue efforts. In March 2020, two additional leaky feeder cables were brought online in the Jubilee line tunnels between Canning Town and Westminster. One of these cables provided commercial 4G coverage for passengers, both in the tunnels and on station platforms, whist the second cable provided coverage for the Home Office's Emergency Services Network (ESN), which is currently being rolled out to replace the ageing Airwave network. This trial section is the first to be brought online as part of a project to provide both commercial 4G coverage and ESN coverage across the entire Tube network.