JOHN YANG: Good evening.

I'm John Yang.

After his Oval Office dressing down on Friday, Ukrainian President Volodymyr Zelenskyy faced a much friendlier group today as he met with European leaders in London.

Zelenskyy said he's still ready to sign the minerals deal he was in Washington to sign on Friday and wants to repair his relationship with President Trump.

Special correspondent Malcolm Brabant in London has our report.

MALCOLM BRABANT (voice-over): What a difference a weekend makes after being humiliated in the Oval Office, President Zelenskyy was back in the warm embrace of fellow Europeans bearing gifts.

KEIR STARMER, British Prime Minister: Very, very welcome here in Downing Street.

MALCOLM BRABANT (voice-over): As peacemaker between Ukraine and the White House, Britain's Keir Starmer reported back to President Trump.

KEIR STARMER: The United Kingdom, along with France and possibly one or two others, will work with Ukraine on a plan to stop the fighting.

And then we'll discuss that plan with the United States.

MALCOLM BRABANT (voice-over): Then at a special security conference in London, Zelenskyy was promised more support from what Starmer calls a coalition of willing European partners.

KEIR STARMER: We are at a crossroads in history today.

This is not a moment for more talk.

It's time to act, time to step up and lead and to unite around a new plan for a just and enduring peace.

MALCOLM BRABANT (voice-over): As the summit got underway, Ukrainians and their supporters paraded their disgust at what they perceived as the Trump administration's appeasement of Russia.

Among those dismayed at the Oval Office scenes was Finland's President, Alexander Stubb.

ALEXANDER STUBB, Finnish President: Probably a wake up call and conversations I've had since in the past 72 hours are pretty much about let's move on, let's get back on track, let's see what diplomacy can do.

And I'm quite convinced that the meeting that we have here in London today is going to give us first baby steps back to the table.

MALCOLM BRABANT (voice-over): Britain promised Zelenskyy 5,000 air defense missiles costing some $2 billion.

And there was relief that the United States remains committed to the principle of defending all NATO allies in the event of an attack.

KEIR STARMER: Nobody wanted to see what happened last Friday.

But I do not accept that the U.S. is an unreliable ally.

The U.S. has been a reliable ally to the U.K. for many decades and continues to be.

MALCOLM BRABANT (voice-over): After the summit, a military helicopter transported President Zelenskyy for an audience with King Charles.

The meeting sent a clear message that Ukraine enjoys unreserved British support.

The government here has resisted pressure to withdraw the offer to President Trump of an unprecedented second state visit to Britain.

With all its royal finery, it wants to keep America on side.

For PBS News Weekend, I'm Malcolm Brabant in London.