Architects, Building D was completed in 1994 and was originally occupied by HM Revenue and Customs as part of their wider Castle meadow site. The site was purchased in late 2021 by The University of Nottingham with the intention of creating a new city centre base for collaboration between business and the University. It will become home to the Business School and a Digital Nottingham hub together with a new business centre for University of Nottingham Innovation Park (UNIP). Building D itself is currently undergoing a sympathetic refurbishment programme to provide three floors of high quality Grade A office accommodation, with the floorplates split equally by a stairwell / lift core incorporating welfare facilities.