Kyle Sandilands and Jackie O Henderson have dominated the breakfast slot in Sydney for almost two decades. But their show’s recent expansion into the Melbourne market has tanked. And while they have a reputation for crude language and stunts, the conversations that are broadcast continue to raise questions about how the show skirts decency standards. Senior correspondent Sarah Martin and reporter Kate Lyons tell Nour Haydar how Australia’s highest-rating radio program gets around broadcast regulations You can support the Guardian at theguardian.com/fullstorysupport