Provisions restricting right to acquire etc. of no effect
179.—(1) A provision of a lease held by the landlord or a superior landlord, or of an agreement (whenever made), is void in so far as it purports to prohibit or restrict—
(a)the grant of a lease in pursuance of the right to acquire, or
(b)the subsequent disposal (whether by way of assignment, sub-lease or otherwise) of a lease so granted,
or to authorise a forfeiture, or impose on the landlord or superior landlord a penalty or disability, in the event of such a grant or disposal.