Prince William and Princess Catherine's major change to their team has raised conjecture about the Princess of Wales's health amid ongoing cancer treatment.

It comes as the Prince and Princess of Wales have appointed the former boss of supermarket giant, Tesco as a director for their foundation.

News Corp Columnist Angela Mollard has joined Sky News host Caroline Di Russo to discuss the royal couple's major change to their team and what it suggests about Princess Catherine’s health.

“What this appointment suggests is that she is getting back to work behind the scenes or at least that she was sufficiently capable of making some decisions around this trusteeship,” Ms Mollard said.

“She would have been consulted on it, and that means that perhaps she is getting better and getting ready to come back to work,” she said.