(1) This section applies if—
(a) the rent to be charged under a renewed lease is being worked out under section 52 (Market rent—rent reviews, options and renewals); and
(b) the lease that is being renewed (the original lease ) expires before the rent has been worked out.
(2) The original lease is taken to continue on the same terms until 14 days after the rent for the renewed lease is worked out and the parties are told about it.