Complex sentence: Its headquarters are located at Dundonald House in Belfast; however they are to be moved to Inishkeen House in Enniskillen, County Fermanagh by June 2015.
Split into simpler sentences: Its headquarters are located at Dundonald House in Belfast. However, they are to be moved to Inishkeen House in Enniskillen, County Fermanagh by June 2015.