Ukrainian President Volodymyr Zelensky used his address to Parliament to urge the UK and the West to provide fighter jets, telling MPs: "Combat aircraft for Ukraine, wings for freedom."
In a surprise visit, Mr Zelensky used an address to Parliament to thank the UK for its steadfast support since Russia invaded. But, as he presented a Ukrainian fighter ace's helmet to Commons Speaker Sir Lindsay Hoyle, he said more planes were needed to defeat Vladimir Putin's forces.
Earlier, Prime Minister Rishi Sunak announced plans to train Ukrainian pilots, paving the way for them eventually being able to fly sophisticated Nato-standard jets, although that is seen as a long-term ambition. Mr Zelensky said he wanted a coalition of nations to supply planes.