Section 783BG | Partial relief: alternative calculation of property profits: introduction
From legislation.gov.uk
An individual qualifies for partial relief for a tax year if—
(a)the individual has relevant property income for the tax year,
(b)the relevant property income exceeds the individual's property allowance for the tax year, and
(c)an election by the individual under section 783BK has effect for the tax year (election for partial relief).