UK Prime Minister Keir Starmer vowed on Tuesday to "leave no stone unturned" to uncover failings in preventing the killings of three girls at a Taylor Swift-themed event, saying an inquiry could lead to a change in terrorism laws.

Starmer said the government must also answer “tough questions” about how authorities failed to stop a violence-obsessed teenager before he stabbed the girls to death in the seaside town of Southport in July.