The King has welcomed South Africa’s president at the start of the first state visit he is hosting as monarch.
King Charles and Camilla, the Queen Consort, formally greeted Cyril Ramaphosa at Horse Guards Parade in London as the two-day trip began.
The president visited Westminster Abbey and later will attend a banquet hosted by the King at Buckingham Palace.
Mr Ramaphosa’s visit comes as South Africa struggles to tackle continuing power blackouts and high unemployment.
It is the first state visit to the UK in more than three years after they were stopped during the Covid pandemic.
The Prince and Princess of Wales met the South African president at his London hotel on Tuesday morning before escorting him to Horse Guards Parade for the ceremonial welcome with the King.
Prime Minister Rishi Sunak, along with Foreign Secretary James Cleverly and Home Secretary Suella Braverman, were also at Horse Guards, where the president and King inspected soldiers from the Coldstream Guards.
More than 1,000 soldiers and 230 horses lined up on the parade ground in central London as part of the traditional opening of a state visit.
His Majesty then rode down the Mall with Mr Ramaphosa in a carriage procession to Buckingham Palace.
The band of the Scots Guards played the South African and British national anthems as the royal party and their guests arrived at the palace where the King, Queen Consort and president had a private lunch.
Afterwards the King showed Mr Ramaphosa a selection of photographs featuring the Royal Family’s connections with South Africa, including a 1996 picture of the former South African president and anti-apartheid campaigner Nelson Mandela at a Buckingham Palace state banquet.
Among the items was a copy of a speech the late Queen gave in Cape Town on her 21st birthday in 1947 where she pledged to dedicate her “whole life whether it be long or short” to service of the Commonwealth.
Mr Ramaphosa, who has been head of government in South Africa since 2018, followed the tradition of laying a wreath at the Tomb of the Unknown Warrior in Westminster Abbey, and addressed MPs and peers in the Royal Gallery of the Palace of Westminster.
Later, the King will host a white-tie banquet at Buckingham Palace for Mr Ramaphosa where both men will give speeches.
The visit follows the traditional format put in place during the reign of the late Queen Elizabeth II.
BBC southern Africa correspondent Pumza Fihlani says the president is hoping to use the state visit to drum up support for UK investment in South Africa to bolster the country’s economic development and industries.
But his visit comes at a time when Mr Ramaphosa is facing criticism over South African unemployment levels and affecting households, businesses and schools across the country – almost every day for a number of hours at a time.
This month he also said he would “step aside” if at his private farm, which he denies.
On the day the state visit in London began, Mr Ramaphosa received the backing of a majority of his African National Congress’ 4,000 branches nationwide ahead of his party’s leadership conference next month.
He will face a challenge for the leadership from former health minister Zweli Mkhize who resigned from the government following corruption allegations at the height of the Covid-19 pandemic.
South Africa’s First Lady, Dr Tshepo Motsepe, has not accompanied the president on the trip to London. She is reportedly recovering from eye surgery and was advised not to travel.
Under a cool blue sky, the pageantry of a state visit was back on the streets of London.
The Household Cavalry paraded in the late sunshine, with the accompaniment of a gun salute and a military band.
The choreography of this grand reception was as crisp as the autumn leaves all around.
When the Irish State Coach appeared, carrying the King, Queen Consort and South African president, bystanders dotted along the Mall gave the modern version of a royal salute, raising their phones to capture the moment.
The Prince and Princess of Wales followed in the carriage behind.
There was a very visible police presence along the pavement too, as the procession headed to Buckingham Palace.
On Wednesday, the Earl of Wessex will escort Mr Ramaphosa to the Royal Botanic Gardens, at Kew in south-west London.
The South African leader will then visit Downing Street to meet Prime Minister Rishi Sunak, before returning to the palace to bid farewell to the King.
Mr Sunak said: “South Africa is already the UK’s biggest trading partner on the continent, and we have ambitious plans to turbocharge infrastructure investment and economic growth together.
“I look forward to welcoming President Ramaphosa to London this week to discuss how we can deepen the partnership between our two great nations and capitalise on shared opportunities, from trade and tourism and security and defence.”
The president is also set to receive a call from Labour leader Sir Keir Starmer and attend a Guildhall banquet with the Duke and Duchess of Gloucester.
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