15. Where it appears to the Board that a person making an application for legal aid is jointly concerned with or has the same interest in the matter in connection with which the application is made as other persons, whether receiving legal aid or not, the Board shall not grant legal aid if it is satisfied that–
(a)the person making the application would not be seriously prejudiced in his or her own right if legal aid were not granted; or
(b)it would be reasonable and proper for the other persons concerned with or having the same interest in the matter as the applicant to defray so much of the expenses as would be payable from the Fund in respect of the proceedings if legal aid was granted.