The people’s republic of Holborn and St Pancras is not exactly fertile Tory territory. But it was in a swanky office in Keir Starmer’s north London patch where Kemi Badenoch chose to make her big energy speech this morning. Rather than dwell on her long-awaited policy commissions, the Conservative leader spent the bulk of her speech explaining her decision to drop the party’s commitment to net zero by 2050.