By Olivia Wheeler Coronation Street recently welcomed mysterious newcomer Rowan Cunliffe to the ITV soap. In upcoming episodes, childhood sweethearts Leanne Battersby and Nick Tilsley will find their relationship tested when Leanne finds herself captivated by the leader of a support group called The Institute, which has the potential to leave their romance on the rocks. Ahead of the sinister cult storyline on the ITV soap, newcomer Rowan introduced himself to Leanne and will feature in new episodes across this week. Leanne attended a seminar for The Institute with her stepson Simon Barlow, whe…