The spectre of concert security has again been raised following the horrific mass shooting at the Route 91 Harvest Festival in Las Vegas.

Gunman Stephen Paddock opened fire on the crowd from the 32nd floor of the Mandalay Bay Hotel during country singer Jason Aldean’s set on October 1, killing 58 people and injuring more than 500 others.

It was the latest atrocity to hit the live music industry, following the terror attacks at Manchester Arena in May and The Bataclan ...