Brownfield development is the subject of an exhibition at Manchester's Cube gallery from 10 February to 23 March. mud (Mixed-use Urban Development) looks at returning life to city centres, and issues covered by the Urban Task Force. Projects include the Kop van Zuid, Rotterdam, Michael Wilford's Lowry Centre, Salford, and Libeskind's Imperial War Museum North in Trafford. mud is curated by Victoria Thornton, designed by fat and sponsored by Buro Happold. Details, tel: 0161 237 5525.