The King has praised the “truly remarkable courage” of the Ukrainian people, on the first anniversary of the start of Russia’s invasion.

“It has now been a year that the people of Ukraine have suffered unimaginably from an unprovoked full-scale attack on their nation,” he said in a statement.

“They have shown truly remarkable courage and resilience in the face of such human tragedy.

“The world has watched in horror at all the unnecessary suffering inflicted upon Ukrainians, many of whom I have had the great pleasure of meeting here in the UK and, indeed, across the world, from Romania to Canada.

“It is heartening that the United Kingdom, along with its allies, is doing everything possible to help at this most difficult time.

“Therefore, I can only hope the outpouring of solidarity from across the globe may bring not only practical aid, but also strength from the knowledge that, together, we stand united.”

The King met with Ukraine’s president Volodymyr Zelenskyy earlier this month, during the war-time leader’s first visit to the UK since the Russian invasion of his country began.

Charles greeted the president with a wide smile and a warm handshake in Buckingham Palace’s 1844 Room, saying he was delighted to meet him.

“We’ve all been worried about you and thinking about your country for so long,” the King said.

On Friday, a defiant Zelenskyy said Ukrainians had proven themselves to be “invincible” as he attended a parade and memorial service out in the open in central Kyiv – to mark a year since Russia’s invasion of Ukraine.

On a day of commemorations and defiance, the Ukrainian president presented awards in the capital outside St Sophia Cathedral to surviving soldiers and wives and daughters of fallen “heroes”.

He described the past year as one of “pain, sorrow, faith and unity”.