With Australia's 2019 federal election taking place in a matter of weeks, Communication Mixdown continues its investigation into the sometimes murky world of political communication. In this edition of the show a look at lobby groups.

We see their spokespeople quoted in newspapers and their ads on TV, but beyond that we tend to know very little about how Australia’s lobby groups get what they want. Lecturer in politics at the University of Melbourne, and specialist in contemparary campaigning strategies and advocacy advertising, George Rennie casts a crtical eye over the vast and still expanding lobbyist landscape.