Regulations 10(1) and 11(1) do not require a landlord, or a superior landlord (as the case may be), to consent to the making of—
a relevant energy efficiency improvement, or
a combination of two or more relevant energy efficiency improvements,
specified in a tenant's request where a report prepared by an independent surveyor states that the relevant energy efficiency improvement, or combination of relevant energy efficiency improvements (as the case may be), would result in a reduction of more than 5% in the market value of the domestic PR property, or of the building of which it forms part.