Andy Burnham and Wales, transport, climate, Little Big Horn and a new MS

What will a Burnham premiership mean for Wales? Former Labour communications advisor Scarlett MccGwire discusses. With a new party in government, what is the future of transport in Wales? Cardiff University's Mark Barry and the new deputy minister for transport, Mark Hooper are in the studio. We've had the hottest June on record and climate change is getting the blame. Professor Hayley Fowler from Newcastle University tells us why. And it's the 150th anniversary of the battle of Little Big Horn in Montana, USA. Journalist and author Mike Lewis knows about a Welsh connection.Our interviews with new members of the Senedd continue: this week we have one of Plaid Cymru's three Rhondda Cynon Merthyr MSs, Sara Crowley.