A key reasoning for the introduction of the system was in light of the King 's Cross fire disaster , where efforts by the emergency services were hampered by a lack of radio coverage below ground . Work was due to be completed by the end of 2002 , although suffered delays due to the necessity of installing the required equipment on an ageing railway infrastructure with no disruption to the operational railway . On 5 June 2006 the London Assembly published the 7 July Review Committee report , which urged TfL to speed up implementation of the Connect system
7 July Review Committee
7 July 2005 London bombings
Transport for London