Section 681BI | Lease treated as ending: rentcharge
From legislation.gov.uk
(1)Subsection (2) applies if a rentcharge payable by L, or a person linked to L, is secured on all or part of the property subject to the new lease.
(2)For the purposes of sections 681BF to 681BH the rent payable under the new lease must be treated as equal to the sum of the rentcharge and the rent payable under the lease.