"The "febrile" atmosphere around Brexit could be exploited by far-right extremists, the UK's most senior counter-terrorism officer has warned."
See: UK: Far-right groups could exploit Brexit tensions – police (BBC News, link):
“Assistant Commissioner Neil Basu said 18 terror plots were foiled in Britain since 2017, four of them far-right.
He said a “far-right drift into extreme right-wing terrorism” was a concern but officers were working to ensure groups did not gain a “foothold”.
Mr Basu added leaving the EU with no deal would be “very bad” for policing.”