An American neo-Nazi group which is led from Russia is to be banned as a terrorist organisation, the UK’s Home Secretary has said.
Priti Patel condemned “evil white supremacist groups, who target vulnerable people across the world”.
The Base will be the fifth extreme right-wing group to be proscribed in the UK under anti-terror laws.
A BBC investigation also exposed the group’s American founder Rinaldo Nazzaro and revealed how he was directing The Base from his St Petersburg home.
The Base, formed in 2018, seeks to create terrorist cells in the US and other countries in an attempt to establish fascist, white ethno-states through a “race war”.
Members have engaged in training with weapons and explosives. Several men linked to the group are being prosecuted in the US for offences including conspiracy to murder.
The group has been heavily disrupted, although leading figures like Nazzaro remain active.
A formal ban in the UK, which will come into force this week if approved by MPs, will make membership or support for the group a terrorism offence with a maximum sentence of 14 years in prison.
The Home Office said the group shared aims and ideologies with Atomwaffen Division, and its alias National Socialist Order, which was banned earlier this year.
The other right-wing extremist groups proscribed as terror organisations are National Action and Sonnenkrieg Division – both created in the UK – as well as Feuerkrieg Division, founded in Estonia.
The Panorama investigation into The Base exposed how Nazzaro and other men interviewed and groomed young recruits from Britain and other countries.
The investigation showed how another leading group member, Matthew Baccari, ran a notorious neo-Nazi online forum linked to multiple terrorism prosecutions in UK courts.