On 7 July 2005, four coordinated suicide attacks struck London's public transport network: three underground trains and a double-decker bus. The bombings killed 52 people and injured hundreds.
The attacks became a defining reference point for UK counter-terrorism policy, intelligence coordination, and emergency preparedness. They also influenced broader European security debates around homegrown radicalisation, surveillance, and inter-agency information sharing.
This entry records the event as a deliberate mass-casualty attack on civilians and critical urban infrastructure.