Complex sentence: In 2008 he succeeded his second cousin Sir John Grey-Egerton, 15th Baronet; having been known for many years as "Major-General Egerton" he chose not to assume the style of "Sir David Egerton".
Split into simpler sentences: In 2008 he succeeded his second cousin, Sir John Grey-Egerton, 15th Baronet. Having been known for many years as "Major-General Egerton", he chose not to assume the style of "Sir David Egerton".