Former Grantham and Kesteven Girls’ School student Freya Colbert has no regrets over missing her school prom to chase the Olympic dream. One of the brightest rising stars in British swimming, the 19-year-old skipped last year’s A-Level results day to represent her country at the 2022 World Championships. During a summer that most of her peers probably spent chugging cider at music festivals, Freya used it to earn her spurs as a senior swimmer, ending up as a European champion. “I missed out on a lot at school, I left a month or two early,” said Freya, who trains in Loughborough at the British …