Complex sentence: This followed the decision of Andrew Lansley, the then Cabinet minister, to stand down at the next general election, and she won the seat in the 2015 general election increasing the Conservative majority, taking 51.1% of the votes cast.
Split into simpler sentences: This followed the decision of Andrew Lansley, the then Cabinet minister, to stand down at the next general election. She increased the Conservative majority, taking 51.1% of the votes cast.