How much of a watershed was the combination of elections that took place in Britain on May 6? To judge from the early reporting and commentary, it was a very big watershed indeed—one that looked out upon a changed political landscape. Its three take-away revolutions were: the Tories had built a stable UK majority upon the defection of Northern blue-collar Labour voters to the “People’s Boris”; Labour had alienated that heartland constituency to the point where it now looked unelectable; and the success of the Scottish National Party—one seat short of a party majority in the Scottish Assembly—meant Scotland’s independence…