Billy, who made his Gloucester first-team debut in February 2012, was nurtured at Hartpury College. Since his debut, the young playmaker made over 50 appearances in the Cherry and White jersey, starting the first five Premiership games of the 2017 season. The Junior World Champion from 2013 displayed undoubted skill and potential, with this leading to Director of Rugby David Humphreys moving swiftly to ensure that Burns stays at Kingsholm, extending his contract beyond 2017.