Anas Sarwar has sensationally called for the resignation of Prime Minister Sir Keir Starmer, saying he has to be "honest about failure wherever I see it".
We ask the BBC's Glenn Campbell what prompted the Scottish Labour leader to finally turn on his friend and former ally.
Scotcast is the BBC's Scottish news podcast. This bonus episode was hosted by Martin Geissler and Natalie Higgins.
Get in touch: scotcast@bbc.co.uk
