Nearly 20 years on from the tragic death of two friends so close they were “like sisters” in a devastating fire , their murderer is still at large. Vikki Preston and Rhona Schofield met at the former Kersal High School, in Salford, Greater Manchester, and were soon inseparable. Five years later, they died side by side -both at the tender age of 19 - when the house they were in was set alight by a mystery arsonist as they slept upstairs in May 2005. To ensure the house burned, the culprit set