Tumultuous in what way? There's so little distance between Conservative and Labour today that it really doesn't matter who's in power.

I think there’s more difference than there has been since the 1980s. People really underestimate how far the Tory base (and parliamentary party following closely) have shifted to the right. The willingness of sitting Tory MPs to knowingly lie and dissemble on immigration related issues to create heat is a real break from a past consensus.

And they have record low shares of the vote, so … seems consistent?

And both are now more unpopular than ever.