By City A.M. Editorial Why is everyone talking about Margaret Thatcher? First the V&A labelled her a “contemporary villain” in an exhibit about Punch and Judy, then last night the Shadow Chancellor evoked her by promising a “1979 moment” in her Mais Lecture. So which was this country’s first female Prime Minister? Britain’s abusive partner in a seaside puppet show or the woman who turned the country around? The answer, as with so much in politics, is a bit of both. The real paradox, though, is the logic dictating Labour’s recent embrace of the Iron Lady. Because what the election of Margaret T…