The Public Service Pensions Act 2013 (c. 25) (“PSPA 2013”) makes provision, and confers powers to make further provision (in the form of “scheme regulations” as defined in section 1 of PSPA 2013), about the establishment of public service pension schemes. The Police Pensions Regulations 2015 (S.I. 2015/445) (“the 2015 Regulations”) are the scheme regulations establishing the successor police pension scheme (“the reformed scheme”) to the schemes established by the Police Pensions Regulations 1987 (S.I. 1987/257) and the Police Pensions Regulations 2006 (S. I. 2006/3415) (“the legacy schemes”). The 2015 Regulations provided for transitional protection for certain cohorts of legacy scheme members. Transitional protection of this sort was subsequently found to unlawfully discriminate between legacy scheme members on the basis of age.