It's all part of the drama involving Anna's lapsed nursing registration and Gwen blackmailing Dolores and then involving Pete in a bid to get Anna her job back.
On Friday, Gwen tries to manipulate Pete into keeping quiet - but he goes to Anna.
Pete tells Anna: "Your friend was the one that told me about your registration."
"Gwen?" says Anna.
"Yeah, the whole thing," Pete continues. "How you'd let it lapse, how you'd been practising illegally - that's who your friend is."
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