http://www.legislation.gov.uk/ukpga/2010/8/section/259NBTaxation (International and Other Provisions) Act 2010An Act to restate, with minor changes, certain enactments relating to tax; to make provision for purposes connected with the restatement of enactments by other tax law rewrite Acts; and for connected purposes.texttext/xmlenStatute Law Database2026-05-05Expert Participation2026-03-18 PART 6ACHAPTER 14259NB1A person (“A”) is in the same control group as another person (“B”)—athroughout any period for which they are consolidated for accounting purposes,bon any day on which the participation condition is met in relation to them, orcon any day on which the 50% investment condition is met in relation to them.2A and B are consolidated for accounting purposes for a period if—atheir financial results for the period are required to be comprised in group accounts,btheir financial results for the period would be required to be comprised in group accounts but for the application of an exemption, orctheir financial results for the period are in fact comprised in group accounts.3In subsection (2), “group accounts” means accounts prepared under—asection 399 of the Companies Act 2006, orbany corresponding provision of the law of a territory outside the United Kingdom.4The participation condition is met in relation to A and B (“the relevant parties”) on a day if, within the period of 6 months beginning with the day—aone of the relevant parties directly or indirectly participates in the management, control or capital of the other, orbthe same person or persons directly or indirectly participate in the management, control or capital of each of the relevant parties.5For the interpretation of subsection (4), see sections 157(1), 158(4), 159(1) and 160(1) (which have the effect that references in subsection (4) to direct or indirect participation are to be read in accordance with provisions of Chapter 2 of Part 4).6The 50% investment condition is met in relation to A and B if—aA has a 50% investment in B, orba third person has a 50% investment in each of A and B.7Section 259ND applies for the purposes of determining whether a person has a “50% investment” in another person.Pt. 6A inserted (with effect in accordance with Sch. 10 paras. 18-21 of the amending Act) by Finance Act 2016 (c. 24), Sch. 10 para. 1