In February, we announced that Margaret Tyzack would be joining the cast to take on the role of Lydia Simmonds, but due to a personal matter she's finished filming earlier than planned.
EastEnders' Executive Producer, Bryan Kirkwood adds: "In order to continue the current storyline we've taken the decision for Heather Chasen to take over the role of Lydia."
Welcome to Walford Heather! Let's hope she can control that scheming Janine as her grandma, Lydia. What do ya reckon?