BIM45960 | Specific deductions: patents and royalties: costs of registering, or extending the life of, trade marks and designs
From HM Revenue & Customs · Business Income Manual
S90 Income Tax (Trading and Other Income) Act 2005, S90 Corporation Tax Act 2009
Expenses incurred in obtaining the registration of a design or a trade mark for the purposes of the trade are allowable deductions. Costs of obtaining the extension of the period of a design right or the renewal of registration of a trade mark for the purposes of the trade are also allowable.