BIM46445 | Specific deductions: professional fees: court proceedings
From HM Revenue & Customs · Business Income Manual
Need to establish the facts
You need to examine the precise nature of the claims by the parties to the proceedings to consider the extent to which the fees are to be disallowed. The fees may be disallowed because they:
are capital expenditure
fail the ‘wholly and exclusively’ test (see BIM42100 onwards), or
are a loss which is not connected with or arises from a trade