TfL begins new signalling system on LU; signs rolling stock leasing deal for Elizabeth Line March 25, 2019 | Europe News Transport for London (TfL) has commissioned a new signalling system, supplied by Thales, on the first section of London Underground’s (LU) Hammersmith & City Line, between Hammersmith and Latimer Road... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password