Coronation Street viewers have predicted Gail Platt might get killed off in upcoming scenes, as the soap stalwart faces a devastating health battle.Wednesday evening's episode saw Gail, played by Helen Worth, row with her two sons David Platt (Jack P Shepherd) and Nick Tilsley (Ben Price) in number eight Coronation Street.David had tricked Gail into bringing her grandson Sam Blakeman to the house - trying to reunite the schoolboy with his dad Nick, who was forbidden from seeing his son.A row broke out when Nick realised what David had done, and Gail was forced to hurry outside for some fresh air.Suddenly, she doubled over, clutching her chest as waves of pain spread through her body.Little Sam followed her out and quickly realising what was.