A UK Royal Air Force C-17 transport airplane carrying Zelenskyy landed at Stansted Airport, north of London.
Zelenskyy will meet UK Prime Minister Rishi Sunak along with Ukrainian troops being trained by British forces, and address Parliament, UK officials said.
The trip comes as Zelenskyy has been desperately seeking military aid from Western allies as Ukrainian officials warn Moscow is gearing up for a spring offensive.
Britain announced on Wednesday it would send more military equipment to Kyiv to help counter a possible Russian spring offensive.
Sunak said the UK would expand training to Ukrainian fighter pilots and marines, while also promising a long-term investment in Ukraine’s military.
The UK will begin training Ukrainian pilots on NATO-standard fighter jets, in what CNN understands would be the first official training program for Ukrainian pilots on Western fighter aircraft.
There was however no mention of providing Ukraine with Western fighter aircraft that Zelenskyy has been calling for.
“The prime minister will also offer to provide Ukraine with longer range capabilities,” a Downing Street statement read.
“This will disrupt Russia’s ability to continually target Ukraine’s civilian and critical national infrastructure and help relieve pressure on Ukraine’s frontlines.”
NATO allies recently answered Kyiv’s calls for main battle tanks to bolster its military — which has until now been relying on Soviet-era tanks.
According to the Downing Street statement, the UK will announce additional sanctions against Russia on Wednesday.
The sanctions will be introduced “in response to Russia’s continued bombardment of Ukraine, including the targeting of those who have helped Putin build his personal wealth, and companies who are profiting from the Kremlin’s war machine,” Downing Street said.
Aussie soldiers teaching ‘citizen army’ in fight against Russia
The UK government has already imposed sanctions on hundreds of Russian individuals and entities since last February when Russia invaded Ukraine, according to UK government data.
“President Zelensky’s visit to the UK is a testament to his country’s courage, determination and fight, and a testament to the unbreakable friendship between our two countries,” Sunak said.
“Since 2014, the UK has provided vital training to Ukrainian forces, allowing them to defend their country, protect their sovereignty and fight for their territory.
“I am proud that today we will expand that training from soldiers to marines and fighter jet pilots, ensuring Ukraine has a military able to defend its interests well into the future.”