I'm not sure what's going on with "Trust Me". Originally SBS was advertising a new series. Now it appears that they are showing Series 1, which according to IceTV has not been screened previously in Australia. At least it is not advertised as a repeat.
Series 2, from what I have read, does not feature Jodie Whittaker because of her involvement in Doctor Who. As far as I know that new series, based on a similar premise as series 1, but with a different cast, has yet to see the light of day.