The University of Edinburgh Development Committee (UDC) was a subcommittee of the University of Edinburgh Court, the governing body of the University. Convened by the Principal, with the University Secretary as secretary, it had responsibility for the physical development of the University. Its job was to translate academic aspirations into plans for buildings, appointing architects, negotiating with the local authority and arranging funding with the University Grants Committee. The UDC itself spawned numerous sub-committees, from time to time, such as the Science Faculty Development Sub-committee and the Conservation Group Sub-committee and other site-specific and building user-groups. As Planning Consultant to the University, Percy Johnson-Marshall received his instructions from the Committee. He provided plans, models, reports and recommendations in respect of his responsibility for the Central Area. This included Bristo Square, George Square, Chambers Street, the Student Amenity Centre, the Medical School Extension, the proposed Dental Hospital, the proposed Physical Education building, Old College and Buccleuch Place; all under the auspices of the University/Nicolson Street Comprehensive Development Area (CDA) scheme. He was also responsible for the Mound/Lawnmarket CDA; incorporating Mylne's Court, as well as the King's Buildings site and Peffer Mill playing fields.