As it happened, Your Party has crashed and burned, and the left flank of British politics now seems to belong to the Greens — who in the last election won only 4 seats in the 650-seat Parliament. Now, they are neck and neck nationally with both Labour and the Tories, depending on the poll. In some surveys, the Greens are now Britain’s most popular party among all voters under the age of 50. Already, in February, behind a charismatic plumber and plasterer named Hannah Spencer, they stormed to victory in a highly competitive, off-cycle election in a Manchester constituency called Gorton and Denton — which as recently as the 2024 general election was judged one of Labour’s safest seats. In the aftermath, the Greens’ polling surged again.