Businesses grappling with rising energy costs could see higher bills under Labour leader Sir Keir Starmer’s proposal to link the UK’s emissions policy with the European Union’s carbon pricing scheme. Critics—including Tory MPs, leading Brexiteers, and energy analysts—warn that adopting stricter EU rules could inflate manufacturing and power-generation expenses, potentially passing higher costs on to consumers. Starmer is in Brussels this week, five years after Brexit, aiming for what he calls a “reset” of the...