If after a landlord has served an offer notice the premises concerned cease to be premises to which this Part applies, the landlord may serve a notice on the qualifying tenants of the constituent flats stating—
and on the service of such a notice the provisions of this Part cease to have effect in relation to that disposal.
A landlord who has not served such a notice on all of the qualifying tenants of the constituent flats shall nevertheless be treated as having duly served a notice under subsection (1)—
Where the landlord is entitled to serve a notice under subsection (1) but does not do so, this Part shall continue to have effect in relation to the disposal in question as if the premises in question were still premises to which this Part applies.
The above provisions of this section do not apply after a binding contract for the disposal of the protected interest—
Where a binding contract for the disposal of the protected interest has been entered into between the landlord and the nominated person but it has been lawfully rescinded by the landlord, the landlord may, during the period of 12 months beginning with the date of the rescission of the contract, dispose of that interest to such person (and on such terms) as he thinks fit.