Datganiad Ysgrifenedig - Dyfarniad y Goruchaf Lys: "R (ar gais UNISON) (Apelydd) v Yr  Arglwydd Ganghellor (Ymatebydd) [2017] UKSC 51"
Written Statement - The Supreme Court Ruling: "R (on the application of UNISON) (Appellant) v Lord Chancellor (Respondent) [2017] UKSC 51"