LONDON — They have been dubbed the Conservative rebels, a group of renegade lawmakers willing to risk their careers to defy their newly chosen leader, Prime Minister Boris Johnson, and hobble his leadership over their clashing views on Brexit.
But behind all the talk of revolutionary ardor and mutinous tactics is an unlikely group of insurrectionists — a band of starchy grandees of Tory politics that includes Winston Churchill’s grandson and a 45-year party veteran and ex-chancellor so colorless that he earned the nickname “Spreadsheet Phil.” Running the government only weeks ago, they now flout it from the sidelines.
They believe that Mr. Johnson, in his zeal for pulling Britain out of the European Union without a deal, is risking severe damage to the British economy. But they also believe that he is tearing the Conservatives apart, setting fire to their vision of a big-tent party with priorities beyond Brexit.
In setting aside their usual caution and threatening to rip the heart out of Mr. Johnson’s Brexit plans on Tuesday night, they are offering perhaps the clearest indication yet that the party, squabbling for decades over Europe, is on the brink of a civil war.