Rising rates of youth unemployment have created a split at the top of government over how fast it should meet its promise to give young people the full minimum wage. Peter Kyle, the business secretary, is understood to believe now is not the time to give 18- to 20-year-olds the full minimum wage, which Labour promised to do in its manifesto. Others believe there is little evidence to show that recent pay rises for low-paid workers have had any effect on unemployment. Torsten Bell, a Treasury minister, told the BBC on Friday morning: “If you look at what the Low Pay Commission said in their annual report, they didn’t find evidence that previous increases in the minimum wage for young people had had an effect on their employment.” The splits have emerged following a landmark government-backed report this week by the former Labour minister Alan Milburn, who found that youth unemployment was costing Britain more than £125bn a year.…