BIM31590 | Value Added Tax: groups and associated companies
From HM Revenue & Customs · Business Income Manual
S43 Value Added Tax Act 1994 provides special provisions for groups and associated companies. Such companies may elect for one among them (known as the representative member) to register and act for the group on VAT matters. VAT is then not normally charged on supplies by one member of the group etc. to another.
As an administrative arrangement, HMRC may allow a company organised in divisions to be registered in the names of its divisions. If this is done, supplies between the divisions do not normally attract VAT.