Section 357NE | Provision of goods or services for NIRE
From legislation.gov.uk
(1)This section applies if the company provides its NIRE with goods or services.
(2)If the goods or services are of a kind that the company supplies, in the ordinary course of business, to third parties dealing with it at arm's length, the matter is dealt with as a transaction to which the separate enterprise principle applies.
(3)If not, the matter is dealt with as an expense incurred by the company for the purposes of its NIRE (see section 357NF).