Property Law Act 1969

In every lease containing a covenant, condition or agreement against assigning, underletting or parting with the possession, or disposing of the land or property leased without licence or consent, that covenant, condition or agreement shall, unless the lease contains an express provision to the contrary, be deemed to be subject to a condition to the effect that the consent shall not be unreasonably withheld and that no fine or sum of money in the nature of a fine shall be payable for or in respect of the licence or consent, but the last mentioned condition does not preclude the right to require the payment of a reasonable sum in respect of any legal or other expense incurred in relation to the licence or consent.

In any instrument executed before or after the coming into operation of this Act a reference to section 4 of the Landlord and Tenant Act 1912 ³ shall be read and construed as a reference to this section.