Complex sentence: He served for five years as the vice chairman of the Ashton under Lyne Constituency Labour Party from 1995, and since the retirement of Ashton's veteran Labour MP Robert Sheldon at the 2001 General Election, he has represented the seat comfortably in the House of Commons.
Split into simpler sentences: He served for five years as the vice chairman of the Ashton under Lyne Constituency Labour Party from 1995. Since the retirement of Ashton's veteran Labour MP Robert Sheldon at the 2001 General Election, he has represented the seat comfortably in the House of Commons.