From Coronation Street Wiki
In the morning Ken finds Janet unconscious in his bed and calls an ambulance. Suzie tries to worm her way into Elsie's affections. Elsie tells Suzie she doesn't want her at No.11 and she can't move in. Janet is rushed to hospital but she is already dead. Ena takes care of a stunned Ken. Emily is shaken by Janet's death. Bet gives Suzie lots of stories about rotten landladies. Ken is questioned over the circumstances of Janet's death.
This episode was included on the 1977 disc of the Network DVD collection Coronation Street: The 1970s, released in 2005.