"In all the circumstances the Respondent applies for the National Union of Mineworkers to be joined as Second Respondent in this case as it now believes that on or around4 June 1999 there may have been a transfer of an undertaking as defined within theTransfer of Undertakings (Protection of Employment) Regulations 1991 , as amended, in which case any liability which is denied but may be found to have attached to the Respondent in connection with the Applicant's claim should pass to the National Union of Mineworkers pursuant to Regulation 5."
"(b) the names and addresses of the person or persons against whom relief is sought; and (c) the grounds, with particulars thereof, on which relief is sought."
"Joinder and representative respondents (1) a tribunal may at any time, on the application of any person made by notice to the Secretary or of its own motion, direct any person against whom any relief is sought to be joined as a party; and give such consequential directions as it considers necessary."