Is the SNP establishment worried by Forbes?

After a tumultuous two weeks, voting is now open for the SNP leadership elections until 27 March. But are members any closer to knowing who they’ll vote for? The deputy first minister of the SNP, John Swinney has backed Humza Yousaf to be SNP leader. What could be seen as an influential endorsement by some, can also be a sign that the Yousaf campaign is worried things are tighter than hoped. 

Michael Simmons speaks to Katy Balls and Alex Massie.