Complex sentence: In spite of further restoration in 1959, the house was to remain unoccupied until the 1980s, when after a period of 160 years the present owner Edward Delaval Henry Astley, 22nd Baron Hastings moved into the west wing.
Split into simpler sentences: In spite of further restoration in 1959, the house was to remain unoccupied until the 1980s. When after a period of 160 years the present owner Edward Delaval Henry Astley, 22nd Baron Hastings moved into the West wing.