Police investigating a serious assault at a Royal Blood gig in Plymouth have issued these CCTV images of two men they would like to speak to in connection with the incident.A 50-year-old man was left with serious injuries, including a fractured eye socket, after the attack.A police spokesman said: "The incident occurred at the rear of the dance hall and during an altercation the victim, a man, aged in his late 50's was pushed to the floor and then kicked to the face and head several times....
