To raise money for lymphoedema research, the actor sat before an audience for artist Frances Segelman, who admired her youthful, ‘pixie-like’ face while rendering it in clay

It began as a blob: a 12kg lump of clay the size of a watermelon. Three hours later, it had become Judi Dench’s head, 50% larger than usual, twinkle-eyed even in terracotta.

At Claridge’s hotel in London on Monday evening, Frances Segelman hosted her latest ticking-clock sculpt: paying guests watch as she kneads a celebrity bust on stage, the subject sitting quietly beside her. In the past, Segelman has done Simon Rattle, Joan Collins, Joanna Lumley, Boris Johnson, Mr Motivator and major-league royals, almost always for charity.