Is Corbyn election as Labour leader a boost for those fighting against austerity? #BBCNolan

Jeremy Corbyn has promised to lead a Labour "fightback" after being elected the party's new leader by a landslide. The veteran left-winger got almost 60% of more than 400,000 votes cast, trouncing his rivals Andy Burnham, Yvette Cooper and Liz Kendall. Labours MPs are being urged to Unite behind their new leader. Prime Minister David Cameron tweeted "The Labour Party is now a threat to our national security, our economic security and your family's security." Is it a boost for those fighting against austerity? Stephen gets the views of journalist Eamonn McCann and NI Conservatives' spokesman, Mark Brotherston