Ayuma & 11 others v Registered Trustees of the Kenya Railways Staff Retirement Benefit Scheme & 2 others; Kothari (Interested Party); Rift Valley Railways Workers Union (K) (Intended Petitioner) (Petition 65 of 2010) [2023] KEHC 22311 (KLR) (Constitutional and Human Rights) (15 September 2023) (Ruling)