"The reasons why the application is resisted are as follows.
"12 (6) In deciding whether or not to exercise our discretion we find that the mistake sought to have been corrected was a genuine mistake, it was not misleading or such as to cause reasonable doubt of the identity of the person to be claimed against.
"5. Accordingly, the Tribunal only had discretion to correct the name of a party. Moreover, it could only take this step if the First Respondent [Mr Burnett] had misnamed or misdescribed the party he intended to sue and not where, because of an error of law, he had mistakenly decided to sue the wrong party and correctly described them.
"In every case in which a tribunal is asked to amend a complaint by changing the basis of the claim or by adding or by substituting respondents they should proceed as follows. (1)....
"(3) an amendment to correct the name of a party may be allowed under paragraph (2) notwithstanding that it is alleged that the effect of the amendment will be to substitute a new party if the court is satisfied that the mistake sought to be corrected was a genuine mistake and was not misleading or such as to cause any reasonable doubt as to the identity of the person intending to sue or, as the case may be, intended to be sued.
"They [The Tribunal] referred themselves to the case of Cocking v Sandhurst (Stationers) Ltd[1974] ICR 650 , which seems to be treated as the leading case on this subject"
"The essence of that case is that:
"The Industrial Tribunal had erred in dismissing the appellant employee's complaint of unfair dismissal and sex discrimination in so far as it was directed against BP Chemicals Ltd, on the ground that it was time-barred because the application to add them as second respondents had been made after the time limit for presenting the complaint had expired.