The SNP have replaced Labour in Scotland. So long as the United Kingdom lasts, that's an Anti-Tory bloc in Westminster as solid as Scottish Labour ever were, and rather more to the left of the Labour MPs they replaced, and well to the left of the anti-Corbyn clique who have been plotting on the backbench during this Parliament.
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Still a chance in this election, if the majority of people who don't trust the Tories can be panicked into realizing the only thing to do in this election is go out and vote for whatever candidate in their constituency is best placed to beat the Tory. Even if that's a Liberal. Or of course SNP or Plaid Cymru.