Guardianship Act 1987

If the guardian of a person dies—

any other person appointed as a guardian jointly with the deceased guardian (the surviving guardian) may exercise the functions that he or she exercised jointly with the deceased guardian (and, if there is more than one surviving guardian, the surviving guardians may exercise those functions jointly), or

if there is no surviving guardian, the person’s alternative guardian for the deceased guardian is taken to be the person’s guardian, or

if there is no surviving guardian or alternative guardian, the Public Guardian is taken to be the person’s guardian.

The provisions of this section apply until the relevant guardianship order is reviewed.