Complex sentence: After their arrival, the Tate family remained in Home Farm for 16 years, albeit with the size of the family decreasing over time as members left or were killed off, with the last, Zoe, leaving in 2005.
Split into simpler sentences: After their arrival, the Tate family remained at Home Farm for 16 years. However, due to members either leaving or being killed off, the size of the family decreased with the last, Zoe, leaving in 2005.