BIM60585 | Disposals of property deriving its value from land – profits treated as trading profits
From HM Revenue & Customs · Business Income Manual
Where the conditions are met, and set out the profits that should be treated as trading profits.
The relevant amount should be treated as profits of a trade carried on by the chargeable company or person.
If the chargeable company or person is non-UK resident, then their trade is dealing in or developing UK land.
The relevant amount should not be treated as a profit or gain for corporation tax or income tax purposes under these provisions, if it would already be brought into account as income for corporation tax or income tax [under another piece of legislation].
The profits are treated as arising in the accounting period in which they are realised.