MI5 Chief Warns of Rising Rightwing Terror Threat in UK 2026

Rightwing extremists are increasingly likely to consider carrying out terrorist attacks, the head of MI5 has warned, marking a significant shift in the UK's security landscape. Ken McCallum, the director general of MI5, said that extremists holding anti-immigration opinions are becoming more inclined to plan attacks against immigration centres and asylum hotels.

MI5 Chief Highlights 'Most Marked Trend' in Terror Threat

In an annual threat update, McCallum described the shift from radicalised rightwing sentiment to violence as "the most marked trend" in the spy agency's caseload over the past year. This trend has contributed to a rise in the overall UK terror threat level. He noted an increase in cases where "extremist versions of anti-immigration and anti-Muslim grievance are tipping into terrorist intent," such as planning attacks on migrants and Muslims.

The warning comes amid a series of aggressive anti-migrant protests held this autumn by the far-right group Patriot Platform in Portsmouth and Dover. Racially and religiously motivated offences are also running at record levels, according to official data.

Young People Increasingly Targeted by Extremist Ideologies

McCallum emphasised that young people are particularly vulnerable to gravitating towards extreme rightwing terrorism. At one point this year, MI5 was "investigating a radicalised … 13-year-old in the UK." He also recalled that a year ago, a 16-year-old from Inverclyde received a 10-year prison sentence after pleading guilty to planning mass murder by firebombing a Muslim centre in Greenock.

These cases underscore the urgent need for early intervention and counter-radicalisation efforts, especially among youth who are being exposed to extremist content online and through social networks.

Comparing Terror Threats: Rightwing vs. Islamist

While Islamist terrorism remains a significant concern, the rise in rightwing extremism has become a growing focus for MI5. The table below compares key aspects of both threats based on recent data.

Although Islamist extremism still accounts for the majority of MI5's caseload, the rapid growth of rightwing terrorism is alarming. The agency has reported a 30% increase in rightwing cases over the past year alone.

Key Takeaways from MI5's Annual Threat Update

• Rightwing extremists are increasingly considering terrorist attacks, particularly targeting immigration centres and asylum hotels.
• MI5 has identified a marked trend of anti-immigration and anti-Muslim grievances tipping into terrorist intent.
• Young people, including teenagers, are being radicalised and drawn into extreme rightwing terrorism.
• The overall UK terror threat level has risen, partly due to the surge in rightwing activity.
• Far-right protests and hate crimes are at record levels, exacerbating community tensions.

Government Response and Community Impact

The UK government has pledged to allocate additional resources to counter-terrorism efforts, focusing on both online radicalisation and community engagement. Home Secretary Suella Braverman stated that the government is committed to tackling all forms of extremism and will work closely with MI5 and law enforcement agencies.

Community leaders have expressed concern over the rising threat, calling for unity and increased support for targeted groups. The Muslim Council of Britain urged authorities to take swift action to protect vulnerable communities and address the root causes of radicalisation.

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