The Government's clinical advisers are alarmed by the rise in medically unnecessary Caesareans performed on women - dubbed 'too posh to push'. Celebrities including Elizabeth Hurley, Catherine Zeta Jones and Zoe Ball are thought to have opted for the procedure to ensure childbirth fitted in with their schedules. Almost one in four babies in Britain is born surgically. An estimated 10,000 women have 'maternal request' Caesarean sections, costing the NHS £25million. The World Health Organisation says only one in ten babies should be delivered this way.