CS6 currently runs from Elephant and Castle to Stonecutter Street.

Early in 2016, TfL with Camden and Islington Councils consulted on their proposal to extend CS6 northwards to Kings Cross. Our discussion and response are here:
http://www.cyclescape.org/issues/2045-north-south-cycle-superhighway-extension-to-kings-cross

One of our main concerns was about the non-signalised junction of Farringdon Street with Snow Hill/West Smithfield.

Therefore this proposal for a signal-controlled cycle crossing over Farringdon Street is welcome.