OT13760 | PRT: non-field expenditure - outline
From HM Revenue & Customs · Oil Taxation Manual
As a general rule the expenditure to be allowed in computing the assessable profit of a participator from a field is limited to costs incurred in connection with that field. There are however special rules to allow relief in any field for the following:
Claims for such expenditure are made under OTA75\SCH7, see OT13775.