EastEnders star Hetti Bywater has suggested a potentially shocking twist in the ‘Who killed Lucy Beale?’ saga.

The 20-year-old actress, whose character was killed off by a head injury on the BBC soap, threw a suicide theory into the mix ahead of the killer’s unveiling. The murderer will be revealed in an upcoming week of live episodes to celebrate the show’s 30th anniversary from February 16.

“Part of me thinks it would give the public a shock if it turned out that Lucy committed suicide. Who killed Lucy? Lucy!” she told Radio Times.

Hetti, who will briefly reprise her role for a flashback episode during the show’s birthday week, also suspects her screen brother Peter Beale, played by Ben Hardy.

“I want it to be Peter. And I’ve dreamt that he did it – he’d been planning it for months, so it was totally premeditated,” she said. “It was a really dark side of Peter that we hadn’t seen before.”

However, Ben reckons Abi Branning (Lorna Fitzgerald) was behind the murder.

“I know it’s Abi – it can’t be anyone else. It’s definitely not a Beale,” he teased. “And remember, I have an extra six weeks’ worth of knowledge that the public doesn’t have. All of which informs me it’s Abi.”

Lorna said: “From day one, I’ve said it was Ian (Beale, Lucy’s father). That would be the biggest shock. But just in case it’s me, I’ve been practising my guilty face.”

Adam Woodyatt, who plays Ian, joked about suspecting all his co-stars.

“I’ve gone full-on Claire Danes from Homeland about this. Over the past eight months, I’ve suspected every member of the cast,” he said. “We used to sit in the Vic pointing the finger at each other: the Beales were blaming the Brannings, while the Brannings were blaming the Beales.”

Other suspects in the frame include Ben Mitchell (Harry Reid), Lee Carter (Danny-Boy Hatchard), Cindy Williams (Mimi Keene), Max Branning (Jake Wood) and Whitney Dean (Shona McGarty).

The cast member playing the killer will be told about their role 30 minutes before the episode goes live.