If for the purpose of any proceedings (whether civil or criminal) brought or intended to be brought under this Act, any person serves upon—
(a) any agent of the landlord named as such in the rent book or other similar document, or
(b) the person who receives the rent of the dwelling,
a notice in writing requiring the agent or other person to disclose to him the full name and place of abode or place of business of the landlord, that agent or other person shall forthwith comply with the notice.
If any such agent or other person as is referred to in subsection (1) above fails or refuses forthwith to comply with a notice served on him under that subsection, he shall be liable on summary conviction to a fine not exceeding level 4 on the standard scale, unless he shows to the satisfaction of the court that he did not know, and could not with reasonable diligence have ascertained, such of the facts required by the notice to be disclosed as were not disclosed by him.
In this section "landlord" includes—
(a) any person from time to time deriving title under the original landlord,
(b) in relation to any dwelling-house, any person other than the tenant who is or, but for Part VII of the Rent Act 1977 would be, entitled to possession of the dwelling-house, and
(c) any person who, . . . grants to another the right to occupy the dwelling in question as a residence and any person directly or indirectly deriving title from the grantor.