LONDON — The self-styled “eco-populist” leader of Britain's Green Party couldn’t be ideologically further from right-wing firebrand Nigel Farage. But, as Zack Polanski presides over a leap in his party's poll ratings, he's actively channeling the Reform UK leader's media strategy, and putting himself front and center of the argument for change. It's a high-stakes gamble that, like Farage, could see him accused of turning the outfit into a one-man band. But so far, it appears to be working. “I