VATDSAG02050 | Handling business separation cases: an overview
From HM Revenue & Customs · VAT Single Entity and Disaggregation
Where you suspect that a business may have been artificially separated, you will need to
interview, or attempt to interview, all parties said to be involved in the business or businesses
make notes of the interviews and the business set up
collect documentary evidence.
Before you can consider whether artificial separation (disaggregation) has taken place, you need to establish whether the business is a single legal entity.