Legal structures for charities
There is no single legal structure for a charity. However, most modern charities use one of three legal forms:
(A) A charitable trust is governed by a trust deed, and can be established simply by an initial donor (the settler') declaring a trust over some property (usually a sum of money) and appointing initial trustees. The trustees can subsequently raise further funds, provided all funds are applied for the specific charitable objects.
Charitable trusts do not have a legal personality, so, in law, any agreements must be made with the trustees collectively, and there is no issue of limited liability.
(B) A charitable association is a group of members who agree to be governed by a set of rules known as the constitution. In most associations, the members elect a committee who are empowered to make decisions on the use of funds, and hence the committee members are the charity trustees.
This is a very flexible structure, suitable for a wide range of small and medium voluntary organisations, including many involved in delivering public services. However, it is again not a corporate form - so agreements must be made with the trustees for the time being - and there is no limited liability.
Not much help but best I can find at the moment