Monobrow is correct if they run out of the core menu they are obliged to provide something else at the same price. If that is the chefs special then so be it. This was proven at a secret test facility in Wiltshire, all the core menu had been eaten by the juniors (shared kitchen)then pipe and slippers gang rock up. And no core menu left, how ever contract monitor lives in and quotes contract details and we all get the chefs special with soup and desert. It took a bit of talking and them getting their duty manager on the blower, I can assure it never happened again.