What happened when two representatives from a Queensland indigenous group travelled to the City of London to try to persuade Standard Chartered bank not to invest in a controversial coal-mine project in their native lands? The Wangan and Jagalingou people have lodged a legal bid to overturn a decision that clears the way for the $16.5bn Carmichael mine, overseen by Indian mining firm Adani. Adrian Burragubba and Murrawah Johnson have also come on a personal mission to tell people of the project's potential impact