Rudolfo Paolozzi was a great maker. In the summer, he worked almost without stopping in the family’s ice-cream shop, making gallon after gallon of vanilla custard. In the slack winter months, when the shop made its money on cigarettes and sweets, he built radios from odds and sods. It was on one of these homemade radios that he heard Mussolini’s declaration, on 10 June 1940, that Italy, the country he had left for Scotland 20 years before, had entered the war.