Why is the former Australian Prime Minister Tony Abbott such a controversial choice for trade adviser? Appointed by the Government to help negotiate post-Brexit deals for the UK, his supporters say he's a persuasive political operator and already has three free trade agreements under his belt. But others have been staggered by his appointment, saying he has a track record of sexism and homophobia, and will prove an "embarrassment" to the UK.

Mark Coles speaks to colleagues, critics and even Abbott's sister to find out what drives the so-called "Mad Monk", and whether he'll make a success of the job.

Presenter: Mark ColesProducer: Ben CrightonResearchers: Charlotte McDonald & Beth Sagar-FentonEditor: Penny Murphy