On the flight to the summit, Mr Brown urged Britons to cut food waste as part of a global drive to help avert the food crisis.

"Twelve voices were shouting in anger, and they were all alike. No question, now, what had happened to the faces of the pigs. The creatures outside looked from pig to man, and from man to pig, and from pig to man again; but already it was impossible to say which was which."

Last paragraph, Animal Farm