Complex sentence: From 1986 to 1990 she served as Assistant Deputy Chair of the Committee of the Whole House and became Deputy Speaker of the House of Commons in 1990 serving until her electoral defeat in the 1993 general election.
Split into simpler sentences: From 1986 to 1990, she served as Assistant Deputy Chair of the Committee of the Whole House, and became Deputy Speaker of the House of Commons in 1990. She served in that role until her electoral defeat in the 1993 general election.