The 2015 Public Service Pension Scheme reforms included a policy of transitional protection. This meant members closest to retirement stayed in their Principal Civil Service Pension Scheme (PCSPS - classic, classic plus, premium and nuvos) as they had the least amount of time to prepare for the changes.
The Court of Appeal (McCloud Judgement) later found this policy to be discriminatory against younger members in some schemes. Following the ruling the Government confirmed that it would take steps to address the discrimination in all affected public service schemes.