According to newly released Home Office figures, Great Britain has recorded 6,539 terrorism-related arrests since the September 11 attacks in 2001. Of that total, 3,021 arrests—nearly 46%—took place in the year ending March 31, 2026. This represents a sharp statistical spike compared to the preceding two decades of data.

The report identifies the government’s decision to proscribe Palestine Action as a primary driver for this increase. The group, which engages in direct action protests, was officially banned on July 5, 2025. Following this legal designation, authorities conducted thousands of arrests targeting individuals accused of supporting or participating in the group’s activities.

While the raw data confirms the volume of arrests, the classification of these actions as 'terrorism-related' has become a focal point of discussion. The Home Office data reflects the legal framework currently in place, which allows for the categorization of protest-related support under broader anti-terror legislation. The Guardian notes that this is the first time a group of this nature has been banned under these specific provisions, marking a shift in how the state utilizes counter-terrorism powers against domestic activist organizations.