If the other person did not claim HB/UC for the other half of the rent, you would have the option of apportioning the rent other than 50/50 to arrive at as near as possible the same amount they could have claimed between them had they regarded themselves as joint tenants and both claimed (this of course is subject to the other person’s income and capital). You might even decide that a 100:0 apportionment in favour of the claimant would be reasonable
