By Jessica Gibb & Chiara Fiorillo Prince Harry and Meghan Markle still hope that they might be asked to become working royals again “on their own terms” but this is unlikely to happen, a royal expert has said. The Duke and Duchess of Sussex are said to have talked about a potential return to royal duties “at length” and reportedly want to help out now that both King Charles and Princess Catherine are battling cancer. However, according to author Tom Quinn, this possibility seems far-fetched as palace sources said they will not be invited back. Harry and Meghan stepped down as senior royals in …