On 27 May, Ukrainian President Volodymyr Zelenskyy decided to name an elite Special Operations Forces unit, Heroes of the UPA,after the Heroes of the Ukrainian Insurgent Army.

He argued that he had done so 'in order to restore the historical traditions of the national army and taking into account the exemplary performance of the tasks entrusted during the defence of Ukraine's territorial integrity and independence'.

To which, Polish President Karol Nawrocki said he had received Zelenskyy's decision 'with great sadness'.

'This is not how relations between nations are built,' he stressed on Friday during a brief meeting with journalists, in Warsaw. He added that the glorification of the UPA provides Russian propaganda with 'a lot of oxygen for disinformation'.

In response to this move, he suggested stripping Zelenskyy of Poland's highest state honour.