Was this not resolved by The Tribunal Procedure (Amendment No 2) Rules 2009, SI 2009 No 1975 which prohibited appeals being admitted outside the 13 months??
We had a similar case and so we wrote and respectfully asked on what grounds had the appeal been admitted in view of the fact that the appeal was outside the absolute time limit.
As a result, the Judge provided a full explanation (decision notice) which in turn showed that they had made a mistake regarding the dates. We wrote back pointing this out and that if they still considered it to be in time, we would provide a full submiission but maintain that the appeal could not be heard.
The Tribunal Judge then realised the mistake and corrected the decision notice stating that the appeal was out of time and asked for the appellant’s comments. We’re now waiting and expect the appeal to be confirmed as struck out.