Complex sentence: Formerly known as Headquarters House, it was home to the Commander-in-Chief of British Forces from 1978 to 1997 and replaced the old Headquarter House or Flagstaff House c.1840s.
Split into simpler sentences: Formerly known as Headquarters House, it was home to the Commander-in-Chief of British Forces from 1978 to 1997. It replaced the old Headquarter House or Flagstaff House c.1840s.