On Saturday, September 6, over 2,500 police officers were mobilised in London as Britain’s Labour government escalated its clampdown on opposition to Israel’s genocide in Gaza. Metropolitan Police units—alongside officers from other regional forces brought to the capital—arrested nearly 900 people in an unprecedented operation lasting from 1p.m. until late in the evening.

In an extraordinary attack on democratic rights, the vast majority (857) were arrested in the vicinity of Parliament Square for their opposition to the proscription—under the Terrorism Act—of the Palestine Action campaign group. They were singled out for displaying a placard containing seven words: “I oppose genocide, I support Palestine Action.” They were apprehended under the Terrorism Act 2000, Section 13 (1), which carries a maximum sentence of six months in prison.

Saturday’s protest was organised by the Defend Our Juries campaign group. With the mass arrests of 55 people in Parliament Square on July 19, more than 70 around Britain the week before, and 532 in the Square on August 9, Saturday’s total took the number arrested for opposition to the proscription enacted on July 5 to at least 1,444.

Below is a WSWS photo-gallery documenting the mass arrests which took place on Saturday in London.