Here is what has happened to opinion polls in Scotland

Everyone wants to know whether the scandals in the SNP has affected their election prospects. Here's the opinion polls in recent months:

The thing to notice is that the drop in SNP vote share is not benefitting the Labour party or the Tories. The votes are going to the Greens (who also support independence).

However, the SNP vote splitting like this might allow the other parties to come through the middle, depending who is in second place in the constituencies.