Business as usual as King Charles and Queen Camilla carry out public duties hours after Andrew's arrest

The monarch was pictured hosting the ambassador of El Salvador, Francisco Lima Mena, at St James's Palace on Thursday afternoon.

He also greeted the ambassador of Spain, Emma Aparici Vazquez de Parga, as well as the High Commissioner for Kenya Maurice Makoloo.

His public duties then continued, making an appearance at London Fashion Week, where dozens of bystanders crowded outside the event's HQ as the King’s car stopped shortly after 2pm.

Read more: LIVE: King supports police probe into Andrew Mountbatten-Windsor

Read more: 'He was never a prince': Virginia Giuffre's family break silence after Andrew's arrest

Crowds gathered behind barriers along Surrey Street. Most were bemused tourists stunned by the numbers of police and press.

As he got out of his car and entered the building there was a smattering of applause, but most people filmed on their phones in silence.

The monarch was also met with groans as he arrived at a separate engagement in the Strand area of London.

Wearing a dark suit, Charles stepped out of the car to a mixture of shouts, cheers and groans from members of the public crowding the streets.

The King's duties were carried out shortly after releasing a statement expressing his "deepest concern" after the former Duke of York was arrested on suspicion of misconduct in a public office.

Queen Camilla was also questioned about the arrest as she left an engagement in Westminster.

As she got into a waiting car outside a lunchtime orchestral concert at Sinfonia Smith Square Hall, she was asked "are you concerned about Andrew’s arrest, your majesty?"

The Queen waved to cameras but did not respond.

Releasing a statement earlier, the King said: "I have learned with the deepest concern the news about Andrew Mountbatten-Windsor and suspicion of misconduct in public office.

"What now follows is the full, fair and proper process by which this issue is investigated in the appropriate manner and by the appropriate authorities.

"In this, as I have said before, they have our full and wholehearted support and co-operation.

"Let me state clearly: the law must take its course."

Neither the King nor Buckingham Palace was informed in advance of Andrew's arrest - which is the first for a first for a senior royal.

The Prince and Princess of Wales are also said to be supporting the King in his statement following the arrest of Andrew Mountbatten-Windsor, it is understood.The King concluded: "As this process continues, it would not be right for me to comment further on this matter. Meanwhile, my family and I will continue in our duty and service to you all. Charles R."

It comes after the former Duke of York was arrested at his Sandringham home on suspicion of misconduct in public office earlier today, on his 66th birthday.

More police have since gone through the gates of Andrew's former Berkshire home as they continue to conduct their search.

Multiple vans carrying police officers arrived at the Royal Lodge residence on Thursday afternoon, where a search of Andrew’s former home is ongoing.

Members of the public, including runners, dog walkers and children on scooters, are still roaming the sprawling parks which surround the residence.

The press are being held at an outer gate beyond Windsor Great Park and are not permitted on the grounds currently.

Speaking on the King, Stephen Roberts, former Deputy Assistant Commissioner at the Metropolitan Police, earlier told LBC's James O'Brien: "If anything went wrong in the operation, it would place him in a very difficult position indeed."

Andrew has previously denied any wrongdoing over his connections to Epstein. He has not responded to LBC's requests for comment on the specific allegations connected to the release of the latest Epstein files in January.

LBC has contacted Buckingham Palace for comment.