TSEM1004 | Introduction to trusts: legal background - trust law: what is a trust?
From HM Revenue & Customs · Trusts, Settlements and Estates Manual
There is no legal definition of ‘trust’. A trust is not a legal person; it is a relationship. The persons in the trust relationship are:
settlor
trustees
beneficiaries
The settlor provides the property for the trust. The trustees hold the trust property in their name, but it is held not for them but on trust for the beneficiaries. The beneficiaries benefit from the trust property - exactly how they do so depends on the terms of the trust.
TSEM6230+ contains more detailed guidance about the legal background to trusts.