CTM60750 | Close companies: close investment holding companies: 'qualifying company'
From HM Revenue & Customs · Company Taxation Manual
A ‘qualifying company’ in relation to the candidate company is a company which is under the control of the candidate company or of a company which controls the candidate company and exists wholly or mainly for either or both of the purposes referred to in or (b) - that is, the company is, broadly, a trading company or a property investment company.