I once walked the catwalk with Elle Macpherson. But her cancer claims are dangerous. Supermodel MARIE HELVIN, who bravely revealed her own mastectomy to the Mail, speaks out

Marie Helvin doesn't sleep well. 'I often only manage 15 minutes at a stretch,' she says. The change is down to Tamoxifen, a drug that reduces the risk of the 72-year-old supermodel's breast cancer returning.