What does a July election mean for the SNP?

We have spoken a lot on the podcast this week about how a July election could be disastrous for the Conservatives, but what about the SNP? With arrests, investigations, resignations and a recent leadership change, it looks as though a snap election couldn't come at a worse time for the Scottish nationalists. Katy Balls speaks to Lucy Dunn and Fergus Mutch, former head of communications for the SNP.