This means that dairy products and eggs have to be brought in from outside. "They eat very little dairy. There is a bit of cheese... they do quite like cheese in salads," says Speake.
"They have eggs at Easter - hens' eggs which they paint red. That is absolutely standard. Again they have to import them as there are no chickens on the mountain." An exception has to be made for wild animals, which would be near-impossible to control.