One character confesses to a murder next week on Coronation Street , and it could change everything. Viewers will recall that months ago, Becky Swain rocked up in Weatherfield four years after her apparent demise in the line of duty. She stunned her wife Lisa Swain and daughter Betsy with the news she faked her death, and had been in hiding in Spain ever since. Since then we've learned that the person who really died that night was a woman named Tia Wardley. DI Costello, who helped Becky flee