Here you’ll find the biggest decorative arts collection in the world, but we headed for the new jewel-lery section, ogling pendants given by Elizabeth I to her courtiers and diamonds worn by Catherine the Great. My designer friend’s favourite was Lady Mountbatten’s ‘tutti-frutti’ ruby, sapphire, emerald and diamond bandeau, which she bought from Cartier in 1929. This was ‘beautiful bling’, he sighed.