Installation of glazed roof covering the Norman Shaw North internal courtyard, to provide further accommodation for parliamentary uses (Sui Generis); internal and external refurbishment, including installation of new building services and rooftop louvres; courtyard roof fixings; secondary glazing; and interiors; alterations to existing openings and basement vaults; piled foundations in Commissioners Yard to support a temporary construction plant gantry, and associated works including temporary construction works. (LINKED TO 19/08243/FULL) REVISED SCHEME: including amendment to courtyard opening associated with main entrance, courtyard roof structural support, courtyard lighting & courtyard floor finish; amendment to roof ventilation detail, access to ducts in reconstructed chimneys; removal of lift from south-west stairwell and omission of UKPN substations.