British Defence Secretary Ben Wallace said on Wednesday he had warned Ukraine that its international allies were "not Amazon" and Kyiv needed to show gratitude for weapons donations to persuade Western politicians to give more.
London has been one of Kyiv's staunchest supporters since Russia's invasion last year, and Prime Minister Rishi Sunak has said Britain and its allies will double down on its support for Ukraine.
But Wallace warned that Ukraine had to persuade U.S. lawmakers and "doubting politicians in other countries that it's worth it", and that "whether we like it or not, people want to see gratitude".
Wallace was speaking on the sidelines of the NATO summit in Lithuania in response to a question from a reporter about Ukrainian President Volodymyr Zelenskiy's complaints that Kyiv had not been given a timeline for joining the alliance.
Wallace recalled that he had travelled last year to Ukraine, where he was presented with a shopping list of weapons.
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