NNDR and NHS Hospital Claim - adjusting or non adjusting post balance sheet event?

On 28th July the appeal court granted the NHS trusts leave to appeal the high court decision in this case. The appeal bundle was accepted by the court on 18th March 2020.

Does this create an adjusting or non adjusting post balance sheet event? Which date do we use to determine this?

FYI the case is material to us.