An appeal must be submitted within 4 weeks after the applicant has been notified of the refusal, according to section 328, subsection 6 of the Administration of Justice Act. The appeal must be submitted in good time so that the Appeals Board can make a decision before the court case concludes with a final judgment or settlement.
You cannot appeal the decisions of the Appeals Board to a higher authority.
Only the party who applied for and was refused legal aid can appeal to the Appeals Board. You cannot appeal the fact that your opponent in a court case has been granted legal aid.