1289. Claims to enfranchisement or extension by subtenant.

Where a person ('the claimant') gives notice of his desire to have the freehold or an extended lease1 of a house2 and premises3, and he does so in respect of a subtenancy ('the tenancy in possession'), then, except as otherwise provided4:


    (1)     the rights and obligations of the landlord5 are, so far as their interests are affected, rights and obligations respectively of the estate owner in respect of the fee simple and of each of the persons in whom is vested a concurrent tenancy superior to the tenancy in possession