Julian's family confirmed he had been killed in a statement released on Sunday, saying: "Julian was a much loved and adored member of our family.

"As he was enjoying the sights of Barcelona with his mother, Julian was sadly taken from us.

"He was so energetic, funny and cheeky, always bringing a smile to our faces.

"We are so blessed to have had him in our lives and will remember his smiles and hold his memory dear to our hearts."

The family thanked those who helped search for Julian in the immediate aftermath of the attack, adding: "Your kindness was incredible during a difficult time.

"We also acknowledge we are not the only family to be affected by the events, our prayers and thoughts are with all people affected."