FBOs at Denham EGLD

City threat summary

London operates under a SEVERE national terrorism threat level, as designated by the Joint Terrorism Analysis Centre effective April 2026, indicating that an attack is considered highly likely; this applies across England, Wales, and Scotland, including the capital.

The U.S. Department of State has issued a Level 2 — Exercise Increased Caution advisory for the United Kingdom, specifically citing terrorism as the basis for elevated concern.

Civil unrest activity in London has increased markedly compared to prior periods, and the broader threat environment is driven by both Islamist and extreme right-wing actors operating as individuals and small groups.

Country overview

The United Kingdom operates under a SEVERE national terrorism threat level, as assessed by JTAC and published on MI5's official website, meaning a terrorist attack is considered highly likely.

The U.S. State Department maintains a Level 2 (Exercise Increased Caution) advisory for the UK, with terrorism as the sole active risk indicator following the removal of unrest and crime indicators in September 2026.

The overall security environment is best characterized as elevated and worsening, driven by converging Islamist, extreme right-wing, and state-linked threat streams.

Higher-risk locations nearby

• Aberdeen EGPD HIGH
• Birmingham EGBB HIGH
• Bristol EGGD HIGH
• Cambridge EGSC HIGH
• Castle Donington EGNX HIGH
• Crawley EGKK HIGH
• Edinburgh EGPH HIGH
• Farnborough EGLF HIGH
• Glasgow EGPF HIGH
• Inverness EGPE HIGH