General election: Anger from Brexit Party candidates as they are stood down

The transcript discusses a political strategy to contest seats in areas where people voted leave but have a Remainer MP. The focus is on challenging Labour in northern constituencies and impacting the Conservative Party's election strategy. The commitment is to contest 300 seats, not 600, to avoid splitting the vote. Historical context from the 2015 election is used to explain the strategy's potential impact.

What strategy is being employed against Labour in the northern constituencies?

What does the speaker mean by 'progressive alliance' in the context of the political landscape?