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A Neo-Nazi group exposed by the Sunday Mirror is set to be banned from Britain, we can reveal.

The far-right National Action group will be added to the government ’s official list of banned terrorist organisations.

Concerns over the groups activities have risen since last summer’s murder of Labour MP Jo Cox by white supremacist Thomas Mair.

There are fears that hardcore National Action fascists are connected to a wider far-right terror network committed to carrying out more atrocities at home and abroad.

Sources say there are concerns the network is linked to white supremacist leaders across Europe and America - including Anders Breivik, the Norwegian terrorist jailed for the murder of 77 people in July 2011.

A source told the Sunday Mirror authorities had uncovered some “deeply disturbing information” about the activities of some National Action members.

(Image: West Yorkshire Police/PA)

Last June, Mirror investigators showed new evidence of National Action activity in the UK to Scotland Yard - and to Labour’s Ian Austin.

The MP confirmed he would be writing to then Home Secretary Theresa May demanding an urgent enquiry into our findings.

Mr Austin, MP for Dudley North, said at the time: “I am asking the Home Secretary to ensure that the police and security services are taking the dangerous threat this investigation has uncovered very seriously.”

Some community groups, including the Community Security Trust, which supports the UK Jewish population against antisemitism, have backed calls for National Action to be proscribed as a terrorist organisation.

The group has concentrated on recruiting younger extremists into its organisation and provoked outrage when it hailed Mair after Mrs Cox’s murder.

Mair was jailed for life last month.

And Garron Helm, a National Action Merseyside member was jailed for sending antisemitic messages to Luciana Berger MP in February last year.

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Last week during the trial of far-right blogger Joshua Bonehill-Paine, at London’s Old Bailey, other leading member of National Action were spotted in the public gallery offering support to the committed antisemite who was found guilty of racially aggravated harassment of the Liverpool Wavertree MP.

Home Secretary Amber Rudd last month warned of the growing threat in the UK of far-right terrorism - particularly through the use of increasingly sophisticated social media techniques.

The government’s Prevent scheme - which has been much criticised for focusing too heavily on Islamic extremism among British Muslims - last month also showed a worrying rise in far-right extremist activity among young people.

Some 70 terror groups in England and Wales have already been banned by the Home Office.

The ban would make it illegal to be a member of National Action or arrange support or funding for the group.