Australia's illegal offshore gambling market has more than doubled since 2019,  with Australians now losing $3.9 billion a year to illegal sites.

That's according to a new report from the gambling lobby.

The federal government is reportedly considering a crackdown on offshore gambling amid internal pressure also to ban advertising across traditional and social media.

• Guest: Kai Cantwell, chief executive of Responsible Wagering Australia, the peak body that represents companies like Bet365 and Sportsbet
• Producers: Joe Sullivan, Grace Stranger