Certain agreements to be void

Where, prior to the coming into force of this Act, any agreement for a tenancy of any premises to which this Act applies was made between the landlord of such premises and any person not in occupation of such premises, and by reason of section 10 of this Act such person is unable to obtain possession of such premises, such agreement shall be deemed to be void and no action for damages or otherwise shall be brought thereon in any court, void. Provided that any consideration by way of rent, premium or otherwise already paid by such person to the landlord by virtue of such agreement shall be repaid by the landlord to such person and shall be recoverable as a civil debt.