Complex sentence: Princess Anne retained her country estate, Gatcombe Park in Gloucestershire, after her divorce, but, when they were married, she and Laurence leased as their London residence a flat in the Dolphin Square complex, in Westminster.
Split into simpler sentences: Princess Anne retained her country estate, Gatcombe Park in Gloucestershire, after her divorce. After they were married, she and Laurence leased as their London residence a flat in the Dolphin Square complex, in Westminster.