An overview of the evidence considered when developing the policy for equalisation of the State Pension age, is provided in the 1993 White Paper, ‘Equality in State Pension age’, a copy of which is available in the House of Commons Library. Estimates of the effect of the increase in State Pension age in the Pensions Act 2011 are presented in the Pensions Act 2011 Impact Assessment, published in November 2011, available at: https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/181462/pensions-bill-2011-ia-annexa.pdf The latter assessment is a comparison of the impact of the Pensions Act 2011 timetable against the baseline of the 1995 Pensions Act timetable.