When I go to the ballot box and vote for my party but that's not the party that 40% of my constituency votes for, if they win in my constituency with that 40% because the 60% is split among a bunch of other parties, then my vote doesn't result in any representation at all. It's just gone. My vote only counts if I decide to vote strategically, as many people did in the last election, and to vote for a party that I think is going to win because it kind of represents my beliefs and I think that's how most of the people in my constituency are going to vote.
On October 20th, 2016. See this statement in context.