King Charles hosted his first state visit since becoming British monarch on Tuesday, welcoming Cyril Ramaphosa to Buckingham Palace, where the South African president invoked Nelson Mandela as he paid tribute to the close ties between the two countries.
Charles, 74, rolled out the traditional pomp and ceremony as Britain sought to bolster its relations with its biggest trading partner in Africa.
"South Africa, like the Commonwealth, has always been a part of my life. My mother often recalled her visit in 1947, the year before I was born, when, from Cape Town on Her 21st birthday, she pledged her life to the service of the people of the Commonwealth," Charles said in a speech at the banquet held in the president's honour
"It is therefore particularly moving and special that you are our guest on this, the first State Visit we have hosted." he added.
Addressing lawmakers in parliament, Ramaphosa lauded the two nations' close ties, forged in the wake of a difficult legacy of colonialism and apartheid.
He later said he had discussed over lunch at Buckingham Palace "initiatives that can be embarked upon by the Commonwealth under the leadership of his majesty the king".
Ramaphosa said he would raise the idea of allowing more South African students to study in Britain when he meets Prime Minister Rishi Sunak on Wednesday, and added that the restructuring of South Africa's energy market to battle power shortages could provide opportunities for British companies.
"By pursuing these and other avenues for cooperation, I believe that we will define the relationship between South Africa and the United Kingdom in new and exciting ways," Ramaphosa said.
Britain hopes the visit, which had been planned before the death of Queen Elizabeth in September, will strengthen trade and investment ties between the two nations, and show the importance of links with the Commonwealth of Nations, the international organisation that Charles now heads.
"This is a reinforcement of the strong bilateral relationship that we have with South Africa, a real opportunity to build on that close working relationship and discuss some of the issues that affect us all," British foreign minister James Cleverly told Reuters.