SolvedCH23800 | Information & Inspection Powers: Information Notices: Third Party Notice: Groups: Groups of undertakings - definitions
From HM Revenue & Customs · Compliance Handbook
An undertaking is a parent undertaking of another undertaking (a subsidiary undertaking) if
it holds a majority of the voting rights, or
it is a member of the other undertaking and has the right to appoint or remove a majority of its board of directors, or
it has the right to exercise a dominant influence over the undertaking
through provisions in the undertaking’s articles, or
through a control contract, or
it is a member of the undertaking and controls alone, or under agreement with other shareholders or members, a majority of the voting rights in the undertaking
it has the power to exercise, or actually exercises, dominant influence or control over the other undertaking or
it and the other undertaking are managed on a unified basis.
‘Subsidiary undertaking’ of a parent undertaking includes subsidiaries of the parent undertaking’s subsidiaries, and so on.