When a young Sophie Lawrence was tasked with producing the catalogue for a Lucian Freud exhibition at Tate Britain, she was thrilled to have the chance to work with paintings she had loved since she was a teenager. Last week, Sophie – now a married mother-of-two who works as an NHS speech… The story of the young Miss Lawrence, who went on to pose nude for Freud for an extraordinary eight months of her life, can now be told in full for the first time, after she learned her portrait is to be sold for up to £20 million. As she came to meet the artist in person, at a dinner where their only interaction came as he peered at her staff pass and giggled, she could scarcely believe it her good fortune. Want the best of The Telegraph direct to your email and WhatsApp? Sign up to our free twice-daily Front Page newsletter and new audio briefings.