(1)  The grandparents of an intestate are entitled to the whole of an intestate estate if the intestate leaves –

(a) no spouse; and

(b) no issue; and

(c) no parent; and

(d) no brother or sister, or issue of a deceased brother or sister.

(2)  If there is only one surviving grandparent, the entitlement vests in the grandparent and, if 2 or more survive, it vests in equal shares.