"In our judgment the argument ... for the respondents is entirely correct and for the reasons set out in paragraphs 21 to 23 the applicants who are common to both the 1997 cases and the 1998 cases are simply seeking to litigate their earlier claims again and are precluded from so doing by the doctrine of res judicata . Those applications which are brought by applicants who are new to the claims in the 1998 cases are dismissed also for abuse of process in accordance with the principles of Ashmore v British Coal Corporation . The workforce is substantially the same and the issues have been dealt with in the 1997 cases. There are no special circumstances to depart from the principles of Henderson v Henderson . It follows, therefore, that all the applications are dismissed as frivolous, vexatious and an abuse of process. All applicants are seeking to re-litigate a dispute which has already been dealt with by a decision of the Tribunal."