A nurse who found a mysterious love-heart locket has been given a helping hand to trace its owner - by Apprentice star Luisa Zissman. Caroline Melville, 50, discovered the golden piece holding pictures of an unknown man and a baby in an Edinburgh street more than four years ago. She has tried to return it to its rightful owner with the help of social media and a Facebook post which has received an incredible 65,000 shares. But the mum-of-four has now received some help to solve the mystery, after former Celebrity Big Brother contestant Luisa Zissman shared her appeal on Instagram. Caroline, a nurse from Armadale, West Lothian, found the locket on Edinburgh's Old Dalkeith Road.