Boris Johnson hailed the battle against Vladimir Putin as Ukraine’s ‘finest hour’ today as he became the first world leader to address Kyiv’s parliament.
With Union flags on show as the PM spoke by video link, he channelled Winston Churchill urging the country to keep resisting the Russian invaders.
Mr Johnson is also announcing a new £300million package of military support as he underlines the UK’s backing for Volodymyr Zelensky and his brave fighters.
The MPs gave the premier a succession of standing ovations, with one saying Ukraine was ‘lucky to have a friend like the UK’.
In another symbolic move, the British ambassador Melinda Simmons – who only recently returned to Kyiv – was present in person to hear the address.
Ms Simmons tweeted a photo of the scene saying it was ‘a huge privilege’ to be at the session, although she later deleted it.
The appearance comes after Mr Johnson’s surprise visit to the Ukrainian capital last month.
The speech was not shown live due to security concerns.
Mr Johnson told politicians the UK is ‘proud to be among Ukraine’s friends’ after reopening the British embassy in Kyiv last week.
In his address to the parliament – known as the Verkhovna Rada – the PM echoed the words of Churchill to the British people during the Second World War.
Mr Johnson said: ‘You have exploded the myth of Putin’s invincibility and you have written one of the most glorious chapters in military history and in the life of your country.
‘The so-called irresistible force of Putin’s war machine has broken on the immovable object of Ukrainian patriotism and love of country.
‘This is Ukraine’s finest hour, that will be remembered and recounted for generations to come.’
He added: ‘Your children and grandchildren will say that Ukrainians taught the world that the brute force of an aggressor counts for nothing against the moral force of a people determined to be free.
‘They will say that Ukrainians proved by their tenacity and sacrifice that tanks and guns cannot suppress a nation fighting for its independence, and that is why I believe that Ukraine will win.’
Mr Johnson regards Sir Winston as his political hero and wrote a biography of the wartime leader’s life called The Churchill Factor.
The new military support will include electronic warfare and GPS-jamming equipment, a counter-battery radar system and thousands of night vision devices.
The package comes after ministers updated Parliament last week on plans to send sophisticated long-range Brimstone missiles and Stormer air defence vehicles.
The UK will also supply heavy lift aerial drones to provide logistical support to Ukrainian forces.
Downing Street said it would also send more than a dozen new specialised Toyota Land Cruisers to protect civilian officials in eastern Ukraine and to evacuate civilians from frontline areas.
Mr Johnson visited Kyiv last month to meet Mr Zelensky after a pledge to give £100million worth of weapons to Ukraine.
The country’s parliament praised the Prime Minister, declaring: ‘Be brave, like Boris. Be brave, like Ukraine.’
The key Ukrainian city of Odesa is planning to honour him by naming a street or square after him.
During Mr Zelensky’s address to the Commons in March, he told MPs: ‘I would like to remind you the words that the United Kingdom have already heard, which are important again. We will not give up and we will not lose. We will fight until the end, at sea, in the air. We will continue fighting for our land, whatever the cost. We will fight in the forests, in the fields, on the shores, in the streets.’
Thanking ‘civilised countries’ for their support, he said: ‘I’m very grateful to you Boris… Please make sure you do what needs to be done and what is stipulated by the greatness of your country. Glory to Ukraine and glory to the UK.’
Britain is at the forefront of the West’s response to Russia’s invasion and has sent more than £450million in military aid to the Ukrainian army, including thousands of missiles.