In a first-past-the-post system, minor populist parties cannot win elections and are better off moving toward the center to remain credible.

“these F populists can get up to 25 30% of the vote but they can never get enough to actually win an election in a first pass post system you have to move back to the center if you're going to be any kind of credible party of government”

The Conservative party is employing a deliberate vote suppression strategy by promoting the idea of a Labour super-majority to discourage voters.

“and this tactic is basically about making feel they personally don't need to vote it's a deliberate vote suppression strategy”