According to Hello! the Duke of Sussex visited Chatham House on Tuesday where he met members of the Royal Institute of International Affairs.
He later attended a Royal Foundation meeting to discuss conservation and sustainability.
Meanwhile it is believe a heavily pregnant Meghan Markle is cooped up in Frogmore Cottage 'nesting' ahead of giving birth.
WATCH: Royal fans go crazy over dad-to-be Prince Harry
Royal baby fever is well and truly in overdrive as the world awaits to hear the history-making announcement of Baby Sussexes safe arrival.
While Meghan's exact due date remains unknown, it is understood the 37-year-old will go in to labour any minute now.
"Their Royal Highnesses have taken a personal decision to keep the plans around the arrival of their baby private," a statement from Buckingham Palace read last week.
"The Duke and Duchess look forward to sharing the exciting news with everyone once they have had the opportunity to celebrate privately as a new family."