(2) Where any such notice is served as aforesaid, then unless within six months after the service of the notice either—
- (a) notice to treat in respect of the interest to which the notice relates has been served by any such Minister, authority or undertakers as aforesaid; or
- (b) an offer has been made to the owner of the said interest by any such Minister, local authority or undertakers to acquire it on terms that the price payable therefor shall be equal to (and shall be determined, in default of agreement, in like manner as) the compensation which would be payable in respect of that interest if it were acquired compulsorily.
the development plan shall have effect, after the expiration of the said six months, as if the land were not designated as subject to compulsory acquisition.