Purpose trusts in English law
In English law, a purpose trust is a trust created for the fulfillment of a purpose, not for the benefit of a person. These are normally considered invalid by the courts because they have no legally recognized beneficiaries, therefore nobody to enforce the trust, with the exception of charitable trusts, which are enforceable by the Attorney General as they represent the public interest.
Source: Wikipedia — Purpose trusts in English law (CC BY-SA 4.0)