Meghan Markle and Prince Harry are “looking for a cause” on their four-day Colombia trip, royal biographer Ian Lloyd has claimed. The Duke and Duchess of Sussex, who arrived in the South American country on Thursday following an invitation from Colombia’s Vice President Francia Márquez, have been discussing the impact of social media. Speaking on GB News host Patrick Christys said: “They’ve chosen to moan to those children about the abuse they’ve suffered on social media. I mean, that just to me seems to be a little bit odd.” Lloyd responded: “I think it’s looking for a cause. They haven’t got…