The SNP might take legal action if Alex Salmond isn't allowed in the leaders' debate.
Quite clearly they do not recognise that this is a debate before a general election, between potential prime ministers (ok, perhaps Clegg won't be, but there's a technical possibility). The SNP will not be returned to power; they aren't standing in enough seats. Therefore, why would they take part in a debate? Alex Salmond won't be our next Prime Minister, he actually can't be.
Threatening to block the screening of it in Scotland if they can't take part is big government blackmail, plain and simple. We know exactly where they stand.