(Reece Shearsmith, who played Wendy, whose top half was never found) Yeah I reckon it was.
Which means it must've been a double-bluff and she was working with him - cos it was supposed to take an hour for the cops to turn up, so he was obviously faking it - and remember he was complaining about being roped into the scheme in the first place. And the whole lot goes to whoever survives.