DET

Det Supt Riddell said: "We arrested 12 people in total in the investigation, and that brings with it a huge amount of digital devices to examine."

Det Supt Riddell said he was "fairly certain" officers knew who two of the other burglars were.

Det Supt Riddell said police were reviewing the case and appealed for anyone with information about the heist to contact TVP.

He attacked Sgt Richard Coleman in the station foyer, hitting him in the head with the pole, and then punched Det Con Joshua Emlyn.

At this point three police officers attempted to restrain Dighton, and he stabbed Det Con Jack Cotton in the leg, wounding him.