CTM15570 | Distributions: general: notification of likely higher rate liability
From HM Revenue & Customs · Company Taxation Manual
Where it appears that a distribution (other than a dividend) may give rise to a substantial higher rate liability on a member, notify Customer Compliance Group (Ocelot) of the amount of income that is comprised in the distribution.
In some cases, a large number of members of a company may receive distributions likely to give rise to liability at the dividend upper rate. The company should be requested to advise those members of the need to include the distribution in their personal tax returns.