Hilary Greatorex (born in Derby) has appeared on Coronation Street in three roles: * The Obstetrician who in May 2004 tended to Sarah Platt, having gone into labour three months' early * Hospital consultant Sian Hammond who treated an unconscious Claire Peacock following the fire at 4 Coronation Street in May 2007 * An unnamed Doctor appearing intermittently between March 2005 and May 2008. She regularly plays "caring professional" roles in corporate training films and voice-overs.