British officials involved in policing the UK's online safety laws could be banned from the United States after the Trump administration vowed to keep out foreign nationals it deems to be censoring Americans.

Secretary of State Marco Rubio lashed out at 'unacceptable' behaviour as he launched a new policy could target officials regulating US tech companies.

And Ofcom officials could be in the firing line, with the organisation responsible for moderating content consumed in the UK.

The Trump administration has already made clear its unhappiness at the UK's tech laws and the upcoming Online Safety Bill, which would tighten controls on who can access content online, as it seeks to help out billionaire-owned tech firms based in the US.

Mr Rubio did not name any specific instances of censorship. But US tech companies and the administration have challenged US allies in Europe, alleging censorship of social media platforms.