January 2012: Concerns raised over Antrim Area Hospital waiting times, with one patient saying how he waited for almost eight hours in A&E suffering from breathing problems
May 2012: Two leaked independent reports highlighted a catalogue of failings that led to the "fundamental human needs" of patients not being met
October 2012: Investigation ordered following the death of a man on an Antrim A&E trolley after waiting almost 24 hours for a bed
December 2012: Health minister Edwin Poots sacked Northern health trust chairman Jim Stewart - the first time a senior health manager has been removed from his post at a Northern Ireland trust
March 2013: A night sister told the Northern trust board that nursing staff felt "totally demoralised" and they were working in "organised chaos"
May 2013: Northern trust chief executive Sean Donaghy stepped aside from his post to take up a new post with the Health and Social Care Board