Flexitarianism suggests freedom of choice, the chance to have it all your own way.

My approach is like 'flexitarianism', where you base most of your meals on plant-based protein like nuts and pulses, then eat good-quality fish or meat once or twice a week.

In the recent presidential campaign, Ralph Nader revealed his food flexitarianism - no meat, but fish is O.K. - while Representative Dennis Kucinich firmly asserted his status as a vegan.

In case flexitarianism doesn't suit you, links on Macmillan's "flexitarian" Web page offer any number of other possibilities: vegan, fruitarian, pescetarian, rawist and even freegan (someone who eats food that has been thrown away).

Sir Paul's passion for the sea goes back to Yellow Submarine and encompasses his stout vegetarianism- no fish-eating "flexitarianism" for him since a Damascene conversion during an angling trip to Tennessee in the Seventies.