Baker Street tube station new Jubilee line was proposed which would take a route via Baker Street, Bond Street, Trafalgar Square, Strand, Fleet Street, Ludgate Circus and Cannon Street, then proceeding into southeast London. This new line was to have been called the Fleet line. The Jubilee line added an extra northbound platform and replaced the Bakerloo line service to Stanmore from the station, opening on 1 May 1979. The initial route on the Hammersmith & City line was formed by the H&CR, running between Hammersmith and Moorgate. Services were eventually extended to Barking via the DR and shared with the existing MR tracks
Trafalgar Square Partners as sub-consultants was completed in 2003. The work involved closing the eastbound road along the north side and diverting traffic around the other three sides of the square, demolishing the central section of the northern retaining wall and inserting a wide set of steps to the pedestrianised terrace in front of the National Gallery. The construction includes two lifts for disabled access, public toilets and a café. Access between the square and the gallery had been by two crossings at the northeast and northwest corners. Barry's scheme provided two plinths for sculptures on the north side of the square.