First Up - The Podcast, Thursday 4 September

On today's First Up pod with Melissa Chan-Green: we head to the UK for more on why a top Government official has referred herself to the ethics committee; we catch up with volcanologist Marta Ribo who's out on a boat in the Pacific where she's mapping the Hunga Tonga-Hunga Ha apai underwater volcano and our Australia correspondent on the latest on the manhunt for Dezi Freeman. First Up - Voice of the Nathan!