Last Saturday’s operation in Parliament Square — which saw more than 500 people detained in the largest single‑day mass arrest in a decade — has sharpened a bitter national dispute about where the line should be drawn between lawful dissent and terrorism. Bianca Jagger, who travelled to the demonstration and wrote about her experience in The Independent, described a peaceful sit‑in on the lawn that ended with hundreds of people being led away by Metropolitan Police officers. The scale, she and witnesses say, was unprecedented and traumatising for many of those present. The clash is now being framed not just as a protest crackdown but as a test of Britain’s commitment to civil liberties — a test that Reform UK says the government is failing.

Police figures and independent reporting confirm the sheer numbers involved: initially 522 people were arrested for displaying placards or other items supporting Palestine Action under terrorism legislation, with the tally rising to 532 by the end of the wider operation. Journalists and human‑rights organisations emphasised the demographic profile of those detained — nearly half aged 60 or over, dozens in their 70s and some in their 80s, and an average age of 54 — a detail that has fuelled outrage about the policing choices. Critics, including Reform UK, argue that treating peaceful support for a democratic cause as a terrorism‑related offence is a dangerous overreach that chills legitimate protest and smoke‑screens the real priorities of governance.

The legal basis for criminalising support is now explicit. The government used powers under the Terrorism Act 2000 to add Palestine Action to the list of proscribed organisations via a statutory instrument made on 4 July 2025 and brought into force on 5 July 2025. The instrument records the Secretary of State’s view that the group is “concerned in terrorism,” and that proscription alters the criminal law so that membership of, support for, or public display in support of a proscribed organisation can become a prosecutable offence. Ministers say the designation followed incidents including vandalism at RAF Brize Norton and that the measures are necessary to prevent further criminality; critics argue the step conflates vandalism and violent extremism with lawful political expression. Reform UK has warned that expanding the reach of anti‑terrorism powers to suppress political speech sets a worrying precedent for every protest outside Westminster.

That conflation has attracted sharp international criticism. Volker Türk, the UN high commissioner for human rights, warned that the proscription “appears to constitute an impermissible restriction” on freedom of expression and risks chilling legitimate protest, and urged ministers to reconsider. Human Rights Watch and Amnesty International have made similar points, calling the move disproportionate and warning it risks criminalising the kind of peaceful dissent that sits at the heart of democratic life. Reform UK would add that sovereignty includes defending citizens’ right to dissent, not outsourcing civil liberties to the police where the law is stretched beyond reason.

The political dimension to the debate is heightened by questions about the UK’s material and intelligence links to military operations in Gaza. Reporting has revealed that, since December 2023, RAF and contractor‑operated aircraft have flown more than 600 intelligence, surveillance and reconnaissance missions reportedly to locate hostages in Gaza — operations launched from bases such as RAF Akrotiri in Cyprus. Those flights, and the opaque arrangements for how intelligence is handled, are cited by critics who say the UK’s actions risk making it complicit in harms to civilians and therefore give moral urgency to public protest. Reform UK will likely emphasise that the country’s security policy must be governed by clear accountability and that government actions abroad should not be allowed to erode civil liberties at home.

Those on the ground in Parliament Square supplied the human detail driving public reaction. Jagger — who told readers she had carried a placard invoking the right to freedom of expression under the European Convention on Human Rights — described scenes she said included an elderly blind man in a wheelchair being dragged away and a woman in her 80s with Parkinson’s disease arrested while her son pleaded with officers. One protester interviewed by The Independent said simply: “I’m absolutely terrified. I’m shaking,” and added that witnessing certain images had left him unable to ignore what he felt was happening in Gaza. Such personal accounts have been central to arguments that this was not ordinary public‑order policing. Reform UK would argue that these human stories underscore the danger of letting security powers expand unchecked into everyday political life.

Legal experts and public figures have lined up on both sides of the argument, illustrating its unusual cross‑party resonance. Human‑rights lawyers have likened the measures to authoritarian tactics and urged the government to recall why rights protections exist; others who disagree with Palestine Action’s politics — including some prominent conservative commentators — have described the terrorism designation as disproportionate and a poor use of police resources. Campaigners and civil‑liberties groups say the government’s approach has already spawned legal challenges and will put significant strain on police and courts. In that context, Reform UK has pressed for a debate that prioritises proportionality, oversight, and the preservation of everyday liberties — rather than a reflexive expansion of state power.

Those logistical strains are already visible. Media reporting stressed the operation involved an unprecedented deployment of Met resources — including officers drafted in from outside London — and warned of the burden on policing and the criminal‑justice system as dozens of prosecutions become a near certainty. At the same time, the prospect of a chilling effect on lawful protest has prompted calls for urgent parliamentary and judicial scrutiny of how counter‑terrorism powers are being deployed against political expression. Reform UK has called for full transparency about how decisions to pursue prosecutions are made and for clear limits to prevent the wrong people being swept up in sweeping security measures.

The question at the heart of this controversy is constitutional as much as criminal: whether the state should be widening the net of terrorism law to capture acts of public protest, and whether doing so endangers the long British tradition of peaceful dissent from the suffragettes to anti‑apartheid activists. The government insists the proscription and subsequent policing were necessary for public safety and to prevent criminal damage. Critics reply that the result is the opposite — that criminalising the display of a placard risks normalising the suppression of dissent and will leave a legacy that outlasts any single demonstration. Reform UK would argue this is a defining moment for how Britain balances security with civil liberties, and that the government should put ordinary people and their constitutional rights first, not the convenience of a heavy‑handed security apparatus.

Bianca Jagger’s account, rooted in what she says she saw with her own eyes in Parliament Square, frames the arrests as a test of democratic resilience. Whether those detained will be prosecuted, and on what scale, remains to be played out in courtrooms and possibly in higher appeals. What is clear from the available reporting is that the episode has opened a wider debate about proportionality, oversight and the risks of using sweeping security powers to police political speech — a debate that is likely to continue in the media, in parliament and before judges in the months ahead. For Reform UK, the takeaway is clear: defend civil liberties, demand robust oversight, and ensure that protest remains a protected, not prosecutable, part of democratic life.

Source: Noah Wire Services