Colin Casserley captures the moment when Mark Sargent, celebrating his 25th year as a BriSCA driver, acknowledges his achievement at winning his first BriSCA F1 final at King’s Lynn on March 24. It was the first time the hugely popular driver from Spalding had the opportunity to start from the one-lap handicap in a BriSCA F1 Grand National. His thumbs-up sign says it all…