Trafalgar Square draw up plans for clearing a large area south of Kent's stable block, and as far east as St Martin's Lane. His plans left open the whole area of what became Trafalgar Square, except for a block in the centre, which he reserved for a new building for the Royal Academy. The plans included the demolition and redevelopment of buildings between St Martin's Lane and the Strand and the construction of a road (now called Duncannon Street) across the churchyard of St Martin-in-the-Fields. The Charing Cross Act was passed in 1826 and clearance started soon after. Nash died soon after
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.