Lessor withholding consent unreasonably
5.—(1) For the purposes of section 18A of and Part I of Schedule 4 to the Act, a lessor is to be taken to have withheld his consent unreasonably where paragraph (2), (3) or (4) applies.
(2) This paragraph applies where—
(a)the lease provides that consent shall or will be given to an alteration of the kind in question; and
(b)the lessor withholds his consent to the alteration.
(3) This paragraph applies where—
(a)the lease provides that consent shall or will be given to an alteration of the kind in question if it is sought in a particular way;
(b)it is sought in that way; and
(c)the lessor withholds his consent to the alteration.
(4) This paragraph applies where the lessor is taken to have withheld his consent by virtue of regulation 4.