RUSSIA has mocked Prince William’s trip to Poland’s Ukraine border.

In a hush-hush visit Wills hailed British and Polish troops “defending our freedoms”.

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In response Vladimir Putin’s foreign ministry mouthpiece Maria Zakharova gave the Prince of Wales a Russian-style name, belittling him as merely “son of Charles”.

She also referred to Britain supplying Ukraine with armour-piercing depleted uranium shells for Challenger 2 tanks.

Zakharova whinged: “I wonder if William Charles-ovich brought depleted uranium ammunition for his troops.”

Wills, 40, brushed off the barb yesterday as he was mobbed by well-wishers in Polish capital Warsaw. 

Later at the Tomb of the Unknown Solider he laid a wreath with the handwritten note: “In memory of those who made the ultimate sacrifice.”

And he had a “warm and friendly” meeting with President Andrzej Duda, who is set to attend the King’s Coronation in May.

Meanwhile in London Charles insisted he was determined to visit Ukraine again “before I get too old”.