Technically, if Louise and James (or Zara, Peter, Beatrice, or Eugenie) wanted to become working royals during William’s reign, they would be his first cousins, much as the Dukes of Kent and Gloucester were to the late QEII, and they were and continue to be working royals all their lives. But the monarchy is so different now that I think we are unlikely to see any of them become full time working royals. However, with Harry’s departure, when Charles and his siblings die or retire, William and Kate will be the only working royals (until their children come of age, I guess) which would mean another wholesale rethinking of how the monarchy works. Charles was keen to not have any “hangers on” from the extended family, being aware of the financial optics, but I don’t think he ever dreamed Harry and his descendants would be removed from the equation. We have started to see Beatrice, Eugenie, and Zara start to take on the occasional event (like the garden parties) and patronage, and I think we’ll see this kind of part time, once in awhile participation from William’s cousins into his reign. But I absolutely think Anne and Edward made the right choice to not give their children titles and make it clear they were expected to live “normal” (albeit very privileged!) lives.
