“(4) Where a claim is being withdrawn a Respondent may make an application to have the proceedings against him dismissed. Such an application must be made by the Respondent in writing to the Employment Tribunal office within 28 days of the notice of the withdrawal being sent to the Respondent. If the Respondent’s application is granted and the proceedings are dismissed the Claimant may not commence a further claim against the Respondent for the same or substantially the same cause of action unless the decision to dismiss is successfully reviewed or appealed.”