“England does not love coalitions,” Disraeli famously declared, adding: “I appeal from the coalition to that public opinion which governs this country.” Yet what if populist discontent — “public opinion” — is the foundation upon which that coalition is formed? That is the visceral appeal of the much-discussed Nigel Farage–Boris Johnson “third-party” alternative that sprang into life at the weekend Sunday since, as Mr. Farage warns, “the whole Brexit project is under threat.”