Lady Louise Windsor has been tipped for a key role in Prince William’s future monarchy by a royal commentator. The eldest child of the Duke and Duchess of Edinburgh is not currently a working royal, as she is studying at the University of St Andrews. However, royal commentator Richard Eden believes that Louise, 20, and her younger brother, the Earl of Wessex, could become working royals in the future. Eden praised Prince Edward as a hard-working member of the Royal Family, especially while King Charles, 75, has paused public-facing duties as he receives cancer treatment. He said: “Never has hi…