698. The resident landlord exemption.

A tenancy of a dwelling house1 granted on or after 14 August 19742 is not a protected tenancy3 at any time if:

  1.  

    (1)     the dwelling house forms part only of a building4 which is not a purpose-built block of flats5; and

  2.  

    (2)     the tenancy was granted by a person6 who, at the time when he granted it, occupied as his residence7 another dwelling house which also forms part of that building8; and

  3.  

    (3)     at all times9 since the tenancy was granted the interest of the landlord10 under the tenancy has belonged to a person who, at the time he