(closed 2011). In 1988 Hatfield, the last men's college, became mixed; followed by the women's college of Trevelyan in 1992, leaving the original women's college of St Mary's as the last single-sex college.
In 1989 the university opened a fund-raising and alumni office, with a virtual community for alumni.
==== Development in Stockton, 1992–1999 ====
In 1991, a joint venture between the university and the University of Teesside saw the Joint University College on Teesside of the Universities of Durham and Teesside (JUCOT) established at Thornaby-on-Tees in the borough of Stockton-on-Tees and the ceremonial county of North Yorkshire, 30 miles (48 km) to the south of Durham. It opened under the name of University College Stockton (UCS) in 1992.
UCS was initially intended to grant joint degrees validated by both institutions (BAs and BScs). However, Teesside, which had only become a university in 1992, had difficulties in taking on its responsibilities for the college and withdrew in 1994, Durham taking over full responsibility for UCS and the degrees to be awarded there.
A programme of integration with Durham began, with the Privy Council approving changes in Durham's statutes to make UCS a college of the University of Durham. Further integration of the Stockton development with the university led to the formation of the University of Durham, Stockton Campus (UDSC) in 1998 and the separation of teaching responsibilities from UCS.
=== 21st century university ===
In 2001, two new colleges, John Snow and George Stephenson (after the physician and the engineer) were established at Stockton, replacing UCS, and the new medical school (operating in association with the University of Newcastle upon Tyne) accepted its first students. In 2002, her golden jubilee year, the Queen granted the title "Queen's Campus" to the Stockton site. By 2005, Queen's Campus, Stockton, accounted for around 18 per cent of the total university student population.
In 2005, the university unveiled a re-branded logotype and introduced the trading …
