northern health and social care trust northern health and social care trust the northern health and social care trust is a health and social care trust in northern ireland, responsible for providing services at various health facilities including antrim area hospital, braid valley care complex, the causeway hospital and mid-ulster hospital. northern health and social care trusttypehealth and social care trustestablished1 august 2006headquartersbush road antrim bt41 2rlpopulation463,297hospitals antrim area hospital braid valley care complex causeway hospital dalriada hospital holywell hospital mid-ulster hospital moyle hospital robinson hospital whiteabbey hospital staff10,370 (2018/19)websitewww.northerntrust.hscni.net history the trust was established as the northern health and social services trust on 1 august 2006, and became operational on 1 april 2007. population the area covered by northern health and social care trust has a population of 463,297 residents according to the 2011 northern ireland census.