Motions debated at the Trades Union Congress Annual conference are usually called "Composites." This is because all of the motions of a similar nature or on the same topic, proposed by several unions, are melded together to make just one motion (otherwise it would take weeks for the cponference to be completed, and many of the debates would be fairly near to identical.)

The process of "Compositing" takes hours, and can be the cause of some bitter rows between rival unions, who each want their own thoughts and wording to go forward.
The term "smoke-filled room", (denoting a negotiation that goes on in private and undemocratically,) comes from this process.