The trip will focus on conservation and, along with all official visits arranged by the Government, will involve a range of engagements designed to further the UK’s relationship with the region. In Angola, the Duke will spend time with landmine charity The Halo Trust, visiting regions made famous around the world by his late mother, Diana, Princess of Wales.In Malawi, he is expected to spend time highlighting conservation issues including the illegal wildlife trade, and work with his own children’s charity, Sentebale.The couple already have links to Botswana, where they went on private holidays in the early days of their relationship.The Duke and Duchess will also be expected to undertake engagements designed to boost trade and diplomacy with the UK, meeting young activists and entrepreneurs, and hosting a garden party to share a message from the Queen. They have so far emphasised their commitment to his privacy, appearing in front of the camera with him at just two days old and posting one photograph of his feet and another of his partially obscured face on Instagram.He will be seen again at his christening in a few weeks’ time, before the family of three all visit South Africa in the autumn.The tour will begin in Cape Town. The Duke will go on to travel further afield, leaving his wife and small son to visit Angola and Malawi at the request of the FCO, and make a working trip to Botswana.He will rejoin the Duchess and Archie at the end of the trip in Johannesburg. Posting on Instagram, a spokesman for the couple said: “The Duke and Duchess are really looking forward to meeting so many of you on the ground and continuing to raise awareness of the high impact work local communities are doing across the commonwealth and beyond.“This will be their first official tour as a family!” The extent of the baby’s involvement in the trip would be a “decision for their Royal Highnesses”, a source said. He will be little more than five months old and some way from perfecting his royal wave.But, as any member of the Royal family will attest, it is never too early to begin service to Queen and country, as Archie Mountbatten-Windsor goes on tour to Africa. Archie, who was born on May 6, will visit South Africa with the Duke and Duchess of Sussex in the autumn, in what his parents describe as their “first official tour as a family”.He is thought to be youngest member of the modern royal generation to undertake a tour.His father, Prince Harry, went to Italy in 1985 at around eight months old, while his uncle the Duke of Cambridge visited Australia and New Zealand at nine months old in 1983. His cousin Prince George made a trip to the same countries at eight months in 2014.Buckingham Palace did not confirm whether Archie would join his parents for any public official engagements, but he is likely to be seen several times on the trip – at least on arrival and departure – as the Sussexes use the visit to build a relationship with the people of the Commonwealth in southern Africa.