Prince Harry was at the UK-Africa Investment Summit in London, which was also graced by Prince William and Kate Middleton. The Duke of Sussex went to the event alone but he was spotted talking to Prime Minister Boris Johnson and the heads of states of Malawi, Morocco and Mozambique.

A few hours before Prince William and Kate were to welcome the summit's delegates, Prince Harry apparently sat down with some of the economic leaders. However, he was not part of the reception hosted by the Cambridges, according to the Daily Express. Instead, the Duke of Sussex flew back to Canada to be reunited with his wife, Meghan Markle. 

Prince William and Kate were representing Queen Elizabeth at this royal engagement. Also around to represent Her Majesty were her daughter, Princess Anne, and son, Prince Edward, who came with his wife, Sophie, the Countess of Wessex. 

Queen Elizabeth couldn't attend the UK-Africa Investment Summit as she was still in Sandringham. Her Majesty is expected to stay in her country house until Feb. 6.

Meanwhile, Prince Harry, reportedly, boarded a plane to Canada on Monday afternoon after going to the summit. It is believed that the event was his very last official engagement as a senior member of the royal family. 

This comes as Buckingham Palace confirmed on Saturday that Prince Harry and Meghan will no longer be using their HRH titles as a result of their choice to scale back from their royal duties. The Duke and Duchess of Sussex plan to live in Canada for the majority of their time. However, they will still retain Frogmore Cottage as their home in the U.K.

Prince Harry and Meghan will also be paying for the cost of Frogmore Cottage's upkeep from their own income. The couple plan to start earning their own money and not be dependent of the Sovereign Grant. 

According to Daily Mail, the Sussexes are now free to secure business deals and expand their brand. The couple is, reportedly, eyeing book deals or projects with media entities like Apple and Netflix. 

Experts predicted that Prince Harry and Meghan could amass a billion-dollar brand when they go commercial. However, the Sussexes have been advised not to enter into deals that will upset and tarnish Queen Elizabeth. 

While they are no longer significant members of the royal family, Prince Harry and Meghan will still need security details. Arrangements are being made for their safety and security in Canada but a majority of the locals are reportedly not in favor of paying for the couple's security costs.