what would UK general elections look like with only two parties. Would lib Dems in southern England switch to the Tories in that case?
Lib Dem voters have usually been relatively more Labour friendly than Tory friendly, and that’s become much more pronounced the past couple of elections. Nationally, these are people who are socially liberal and therefore, if you pushed them, most would reluctantly vote Labour (including many who used to vote Tory). The Green vote would overwhelmingly go Labour, who the
UKIP Brexit Party vote would largely go Tory. The SNP vote would largely go Labour (and there’s questions of what would happen to the Scottish Tory vote without the SNP threat), albeit as with the Lib Dems there would be enough leakage in posh/rural areas for the Tories to gain a number of their seats. No idea in Northern Ireland, except Belfast/Londonderry would be Labour and presumably places like North Down and North Antrim would be Tory.