With the Lucy Beale whodunit beginning on BBC One and RTÉ One this week, EastEnders star Jacqueline Jossa has said the soap is "changing forever".

In an interview with The Sun, Jossa, who plays Lauren, said of the secrecy surrounding the plot and Lucy's murderer's identity: "The writers don't even write the secrets down; it's all in their heads."

Jossa added: "When they want us to know, we'll know."

The storyline will run up to the show's 30th anniversary next February.