Sch 9 Pt II para 3
The supply of goods and services by a charity or a qualifying body in connection with an event— (a) that is organised jointly by a charity, or two or more charities, and the qualifying body, (b) that is so organised exclusively for charitable purposes or exclusively for the body’s own benefit or exclusively for a combination of those purposes and that benefit, (c) whose primary purpose is the raising of money, and (d) that is promoted as being primarily for the raising of money.