Sadiq Khan, flanked by Amber Rudd and Diane Abbott, at the vigil last night held for the victims of Saturday night’s attack

Theresa May has launched a review into the London Bridge attack as the third terrorist was named as an Italian-Moroccan man who was arrested last year attempting to get into Syria.

Youssef Zaghba, 22, was able to enter the UK despite being Italian authorities putting him on a watch list and flagging his presence to British and Moroccan counterparts, according to reports from Italy.

It puts further pressure on the British security authorities, who have been accused of letting another of the three attackers, the British-Pakistani Khuram Butt, “slip through the net”.

Youssef Zaghba was reportedly arrested last year trying to get to Syria AFP/METROPOLITAN POLICE

Zaghba was born in Fez in January 1995 to a Moroccan father and Italian mother, Valeria Collina, who is from a small town, Castello di Serravalle, 25km outside Bologna

After his parents split