“When the rent payable under the lease is higher than the rental value of the property at the time of the tenant’s default, the landlord’s financial interests may be better served by looking to the guarantor than by taking possession of the property and reletting it. Similarly, if the impecunious tenant is not the original tenant but a person to whom the lease has been assigned, the landlord may look to the original tenant for payment. When the lease was granted the original tenant covenanted with the landlord to pay the rent and to do so throughout the whole term of the lease. This included any increased rent payable under the rent review provisions. In these cases the loss falls on the guarantor or the original tenant, not the landlord.”
“Sometimes, in post-assignment cases, the landlord’s protection may be achieved at an unreasonably high price to others. The insolvency may occur many years after the lease was granted, long after the original tenant parted with his interest in the lease. He paid the rent until he left, and then took on the responsibility of other premises. A person of modest means is understandably shocked when out of the blue he receives a rent demand from the landlord of the property he once leased. Unlike the landlord, he had no control over the identity of the assignees down the line. He had no opportunity to reject them as financially unsound. He is even more horrified when he discovers that the rent demanded exceeds the current market rental value of the property. Mounting public concern at this post-assignment state of affairs led to the enactment of theLandlord and Tenant (Covenants) Act 1995 . In future, where a tenant lawfully assigns premises demised to him he will be released from the covenants falling to be complied with by the tenant of the premises.”
“ …the best answer seems to be that the statute takes effect as a deeming provision so far as other persons’ preserved rights and obligations are concerned. A deeming provision is a commonplace statutory technique. The statute provides that a disclaimer operates to determine the interest of the tenant in the disclaimed property but not so as to affect the rights or liabilities of any other person. Thus when the lease is disclaimed it is determined and the reversion accelerated but the rights and liabilities of others, such as guarantors and original tenants, are to remain as though the lease had continued and not been determined. In this way the determination of the lease is not permitted to affect the rights or liabilities of other persons. Statute has so provided.”