We have interpreted the question as asking how many women in total were affected by State Pension age equalisation in either the Pensions Act 1995 or the Pensions Act 2011 or the increase in the State Pension age to 66 in the Pensions Act 2011. The estimated number of women born between April 1950 and December 1959 who are affected by the changes to State Pension age made in the 1995 and 2011 Pensions Acts is 3.48 million. This figure, rounded to the nearest 10,000, is for Great Britain and is based on DWP calculations using ONS statistics. <p />