Carla Connor is set to be a key character in Sam Blakeman's mental health storyline on Coronation Street next week. While the character has not been in scenes with the struggling teenager so far, she enters the storyline at a crucial time. In fact, it's Carla that makes other Weatherfield residents realise what is going on with Sam. No one has noticed until now that Sam is spiralling, and he's imagining conversations and moments. From torment at the hands of Will Driscoll to Roy Cropper giving