Nigel Farage’s enemies have watched the opinion polls over the past six months with some satisfaction, as air has escaped from the Reform balloon. From a peak of 31 per cent in October, average support for Reform has fallen to 26 per cent now. The party is still comfortably in the lead in a five-way contest, but the projections of what the House of Commons would look like have shifted from a landslide Reform majority to a hung parliament in which Farage would need Conservative support to govern. Meanwhile, Zack Polanski has seen his party’s support double since he became...