The Employment Tribunals Presidents in England and Scotland have issued a Case Management Order, effectively staying (pausing) any case brought in reliance on the decision of the Supreme Court in [Unison]". 

The stay is place pending a decision from the Ministry of Justice and HMCTS in relation to the implications of that decision. 

The Order is presumably a response to what is widely expected to be a significant number of historical claims which were either previously not submitted because Claimants were put off by paying the application fee, or which were rejected or dismissed because the correct fee had not been paid. 

It seems likely that any cases brought as a result of the Supreme Court's ruling (that Employment Tribunal fee regime was discriminatory and unlawful) will be paused until the MoJ/ HMCTS has decided what to do with them.