The unit will be created from the existing firearms units of the British Transport Police, the Civil Nuclear Constabulary and the Ministry of Defence Police.
Plans for the unit are under review by the country's police chiefs to create a 4,000-strong armed force under one central command, the first of its kind in the UK.
According to The Financial Times, the new squad will be known as Armed Infrastructure Constabulary and is expected to be a highly mobile team with unified systems and communications.
Rick Muir, director of the Police Foundation think-tank, told the newspaperthe policy was an "inevitable" response to terror attacks on the continent which involved perpetrators using firearms to create mass casualties.
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However, he warned against giving more guns to the British Transport Police, who are "much more public-facing" than the other forces who would be merged.
"If you merge organisations that use armed officers in different roles, you do not want a creeping of specialist methods into new contexts. You do not want an armed force regularly patrolling the trains, for instance," he said.
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