475. Former landlord may be released from covenants on assignment of reversion.

Where:

  1.  

    (1)     a landlord1 assigns the reversion2 in premises of which he is the landlord under a tenancy3 (whether or not he is landlord of the whole of the premises comprised in the tenancy4); and

  2.  

    (2)     immediately before the assignment5, a former landlord of the premises remains bound by a landlord covenant6 of the tenancy ('the relevant covenant')7,

then, regardless of whether or not the former landlord has previously applied8 to be released from the relevant covenant9:

  1.  

    (a)     if, immediately before the assignment, the former landlord does not remain the landlord of any other premises demised by the tenancy, he