Sixty developments - including those by firms such as Copthorn, Bellway, Linden, Barratt and David Wilson - have been shortlisted for the government-backed 2004 Housing Design Awards. This year's winners will be announced on September 7 at Housebuilding 2004, the UK's first dedicated event for the industry. This will take place at the Business Design Centre in islington, London. Thirty …