London Underground uses a leaky feeder system for its internal communication network '' Connect '' . The emergency services ' communications system however was not compatible and did not work underground . 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
7 July 2005 London bombings
7 July 2005 London bombings
Leaky feeder