BIM24490 | Meaning of trade: mutual trading and members clubs: allocation of income: income from contributors (members)
From HM Revenue & Customs · Business Income Manual
Income from members falls into a number of broad categories:
Subscriptions - for ordinary members this forms part of the non-taxable income arising from the club’s mutual activities; for temporary members or junior/honorary members, whose subscriptions subsidise those of ordinary members and whose rights are not equivalent to full members, this is taxable as trading income - see BIM24220, BIM24225 and BIM24240.
From non-trading activities - this is not taxable as trading income. But remember that non-trading items are taxable in the normal way, for example rental income will be taxed under the property income rules.
From trading activities where the conditions in BIM24020 are satisfied, this is not taxable on the basis that it derives from a mutual trade.