Complex sentence: Lemmons, also known as Gladsmuir House, was the home of novelists Kingsley Amis (1922--1995) and Elizabeth Jane Howard (1923--2014) on Hadley Common, Monken Hadley, on the border of north London and Hertfordshire.
Split into simpler sentences: Lemmons, also known as Gladsmuir House, is the former home of novelists Kingsley Amis (1922--1995) and Elizabeth Jane Howard (1923--2014). It is located on Hadley Common, Monken Hadley, on the border of north London and Hertfordshire.