Among the many electoral subplots emerging ahead of the next UK general election, one in particular is occupying the minds of Liberal Democrat strategists: how to persuade a glut of new Labour supporters to vote tactically.
What the Lib Dems are calling a “Labour squeeze” tactic could help shape the result in a dozen or more constituencies, and potentially remove a series of Conservative big-hitters including Dominic Raab and John Redwood. But, it is fair to say, this is intricate stuff.