(b) if later, the day on which the landlord (or in the case of joint landlords, any one of them) becomes aware that the identity of the contract-holder has changed.
(b) os yn hwyrach, ar y diwrnod y mae’r landlord (neu yn achos cyd-landlordiaid, unrhyw un ohonynt) yn dod i wybod bod deiliad y contract wedi newid.