CTM08455 | Corporation Tax: Management expenses: Capital allowances on structures and buildings
From HM Revenue & Customs · Company Taxation Manual
and apply capital allowances provisions on the Structures and Buildings Allowance to structures and buildings used for the purpose of management of the business of a ‘company with investment business'.
Where capital allowances are not allowed as a deduction in computing income (for example in the computation of property or trading income), the capital allowances should be added to the management expenses for the period.
to S270HI apply to life assurance companies. Guidance on the capital allowances available to life assurance companies is given in the Life Assurance Manual.