The Prince of Wales was mocked by the Kremlin after visiting British troops in Poland.
William was on a surprise visit to Rzeszow, just miles from the Ukraine border, where he thanked soldiers for "defending our freedom".
But the visit which was heavily flanked by security teams was ridiculed by Maria Vladimirovna Zakharova, Russia's Director of the Information and Press Department of the Ministry of Foreign Affairs, who belittled his title referring to him as "son of Charles".
