(Photo by Brook Mitchell – WPA Pool/Getty Images) We are entering a week that will define British politics for years to come. After months of anguished prevarication, Labour MPs have finally – and definitively – concluded that Keir Starmer is not up to the job. The question they are now wrestling with is not whether to remove him as Prime Minister but how the process of his removal will play out. And yet, as all sides in the coming struggle for power privately acknowledge, the stakes could hardly be higher – not just for themselves and the future of the Labour Party, but for the country itself. We should not be squeamish about the prospect that lies before us: civil war within the Labour Party. While every faction of the party is now united in its hostility to Starmer, there is deep division over what should come next.…