13(1)
Except as provided by subsection (2) below—
(a) A tenancy shall not be a protected tenancy at any time when the interest of the landlord under that tenancy belongs to Her Majesty in right of the Crown or to a government department or is held in trust for Her Majesty for the purposes of a government department; and
(b) a person shall not at any time be a statutory tenant of a dwelling-house if the interest of his immediate landlord would at that time belong or be held as mentioned in paragraph (a) above.
13(2)
An interest belonging to Her Majesty in right of the Crown shall not prevent a tenancy from being a protected tenancy or a person from being a statutory tenant if the interest is under the management of the Crown Estate Commissioners.