4. Any premises occupied in whole or in part—
(a)by a person who is a relative of the applicant or the applicant’s partner as that person’s home where that person has attained the qualifying age for state pension credit or is incapacitated;
(b)by the former partner of the applicant as that person’s home; but this provision does not apply where the former partner is a person from whom the applicant is estranged or divorced or with whom the applicant had formed a civil partnership that has been dissolved.