President Emmanuel Macron upbraided a French teenager on Monday after the boy addressed the president informally as “Manu” and sang the socialist anthem in front of him. Macron was attending a ceremony in northern France to commemorate General Charles De Gaulle’s call for popular resistance during World War Two.

The young man, who looked to be in his mid-teens, was standing behind a barrier as Macron passed along the crowd. He was captured on LCI television singing the words of the international socialist anthem before asking the president, “Ca va Manu?”.

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“No, no, you are here at an official ceremony,” Macron, 40, told him sharply. “You can’t just behave like that.

“You can act like a clown, but today it’s the ‘Marseillaise’ and the ‘Partisans Song’ we’re singing. You address me as Mr President of the Republic or plain mister.” The boy, shaggy hair falling in front of his eyes, apologised.