Some people think that advertising’s an easy life, involving brainstorming sessions, table football in the office and lashings of cocaine. Try telling that to Tamara Rojo and Jonathan Cope. The lucky pair, principal dancers at the Royal Ballet, recently spent three hours at the bottom of the Crystal Palace diving pool, being kept alive by divers. And the reason? They were posing for promotional material for Ondine, a ballet in which a water nymph kisses her lover to death and makes off with him to the bottom of the sea. The Diary admires their courage, their strength and their indefatigability, but has to ask: is it wise to give the ending away in the ads?