| Date | 31 March 1990 |
| Location | Trafalgar Square, London, England |
| Caused by | Demonstration against the Community Charge (Poll Tax), introduced by the Thatcher government |
| Resulted in | 340 arrests; 189 convictions; £3.5 million in property damage; accelerated internal Conservative Party pressure leading to Thatcher's resignation in November 1990; abolition of the Community Charge by 1992 |
| Parties | Anti-Poll Tax Federation · Metropolitan Police · Demonstrators · London Fire Brigade |
| Lead figures | Margaret Thatcher, David Waddington, Neil Kinnock |
The Trafalgar Square Riot of 1990 was a civil disturbance on 31 March 1990 in central London, England, precipitated by a large demonstration against the Community Charge — commonly known as the poll tax — introduced by the Conservative government of Margaret Thatcher. The riot resulted in an estimated 340 arrests, injuries to approximately 113 police officers and 86 civilians, and damage to property in and around Trafalgar Square, Charing Cross Road, and the Strand estimated at £3.5 million.
By early 1990, public opposition to the [Community Charge](/wiki/community-charge-1990) had reached a sustained peak across England and Wales. The tax, which replaced the domestic rates system and imposed a flat per-head levy regardless of income, had been introduced in Scotland in April 1989 and extended to England and Wales on 1 April 1990. Campaigners from the Anti-Poll Tax Federation, founded in late 1988, had coordinated protests in dozens of cities throughout the preceding year. A national demonstration in London was announced for 31 March 1990 — the day before the charge came into legal effect in England and Wales — and organisers anticipated an attendance of between 40,000 and 70,000 people.
The Metropolitan Police had designated the event a Category A public order operation and deployed approximately 3,000 officers across central London. Liaison between the Anti-Poll Tax Federation and the Metropolitan Police had been conducted in the weeks prior through the Public Order Branch, though subsequent inquiries noted that the formal command structure had not anticipated crowd volumes above 50,000.
### Morning
The march departed Kennington Park at approximately 11:30 a.m. on 31 March 1990, proceeding north through Lambeth and across Waterloo Bridge before turning west along the Embankment toward Whitehall. Attendance along the route was estimated by independent observers at between 200,000 and 250,000 — substantially exceeding the projections of both organisers and police. The march remained largely orderly through its first two hours.
### Afternoon
Tensions escalated in Trafalgar Square from approximately 3:15 p.m., when mounted police were deployed along the south side of the square following reports of projectiles thrown near the South Africa House. The sequence of events that immediately preceded the outbreak of violence has been disputed in subsequent accounts. The report of the Metropolitan Police Commissioner, submitted to the Home Office in June 1990, attributed the initial breakdown to the actions of a group of approximately 200 individuals who had assembled near the base of Nelson's Column and began dismantling temporary crowd-control barriers. Witness statements collected by the National Council for Civil Liberties — later Liberty — recorded a different sequence, attributing the first use of force to mounted officers advancing without prior dispersal order into a stationary crowd on the northern steps of the square.
### Evening
By 6:00 p.m., disorder had spread east along the Strand and north into St. Martin's Lane and Charing Cross Road. Shop fronts were damaged across a stretch of approximately half a mile. Several vehicles were overturned near the junction of the Strand and Aldwych. A fire was recorded in a ground-floor commercial unit on William IV Street at 6:43 p.m. by the London Fire Brigade, suppressed within fourteen minutes. The Metropolitan Police declared the immediate area around Trafalgar Square a dispersal zone under the Public Order Act 1986 at 7:15 p.m. Order was substantially restored by 10:00 p.m., though isolated incidents were recorded in Soho as late as midnight.
Prime Minister Margaret Thatcher addressed the House of Commons on 2 April 1990, condemning the violence as "an assault on the democratic fabric of the city" and reaffirming the government's commitment to the Community Charge. The Leader of the Opposition, Neil Kinnock, condemned the violence while calling for an independent inquiry into the policing operation. The Home Secretary, David Waddington, announced on 4 April that a review of public order command procedures would be conducted by Her Majesty's Inspectorate of Constabulary.
Of the 340 individuals arrested, 274 were subsequently charged, principally under the Public Order Act 1986. Charges included violent disorder, affray, and criminal damage. Convictions were recorded in 189 cases. The youngest person convicted was seventeen years of age; the oldest, sixty-one.
The riot is widely cited as one of the most significant factors in the accelerating internal pressure within the Conservative Party that led to [Margaret Thatcher's resignation](/wiki/margaret-thatcher-resignation) in November 1990, eight months after the disturbance. Cabinet minutes declassified in 2021 record that the scale of the London disorder was raised at a Cabinet meeting on 5 April 1990 as evidence of the political unsustainability of the Community Charge as legislated.
The Trafalgar Square Riot of 1990 entered the historical record as the most serious episode of civil disorder in central London since the Brixton riots of 1981. The [Poll Tax](/wiki/poll-tax-england) itself was formally abolished by the Local Government Finance Act 1992, replaced by the Council Tax system, a banded property-based levy that restored an element of means-relation to local taxation.
Academic assessments of the event have emphasised its role in demonstrating the limits of large-scale flat taxation as a domestic policy instrument. A paper published in the *British Journal of Political Science* in 1994 by researchers at the London School of Economics concluded that the Trafalgar Square Riot represented "the most electorally consequential act of collective disorder in post-war British domestic politics," a characterisation that has been cited in subsequent scholarship on the [Peasants' Revolt of 1381](/wiki/peasants-revolt-1381), the [Kinder Scout Mass Trespass](/wiki/kinder-scout-mass-trespass), and related episodes of organised civic resistance in English history.
The Metropolitan Police's internal review, published in redacted form in December 1990, resulted in revised guidance on the deployment of mounted units within dense static crowds — guidance that was incorporated into the updated Public Order Manual issued to all forces in England and Wales in 1992.
The riot has been depicted or referenced in several works of fiction and documentary. The 2001 Channel 4 documentary *The Day the Square Burned* reconstructed events using contemporaneous footage and interviews with twelve participants, including three former police officers. The production was awarded a BAFTA nomination in the Factual category in 2002.
Billy Bragg referenced the events of 31 March 1990 in a BBC Radio 4 interview recorded in October 2010, describing the demonstration as "the moment the country said no, and meant it." Playwright David Hare included a fictionalised depiction of the riot's aftermath in his 1993 stage work *The Settlement*, performed at the Almeida Theatre in Islington.