Black Wednesday 1992: UK’s ERM Exit and Financial Impact

Gilt yields hit a 28-year high 2026

In a global bond sell-off, the yield on 30-year UK government bonds peaked at 6.036% on 7 October 2026, the highest since January 1998, Reuters reported. Higher borrowing costs had already eaten into the fiscal room of John Healey, Chancellor since Andy Burnham became Prime Minister on 20 July 2026, ahead of his first budget on 28 October.

This is a different kind of pressure from 1992. Sterling floats, so there is no exchange-rate floor for markets to attack, and no reserves are being spent defending one. The test now is fiscal credibility, but the underlying question is the one Black Wednesday asked: will markets believe the government’s plan?

Gilts’ worst day since Black Wednesday 2026

Short-dated gilts suffered one of their worst days on record after Iranian strikes on Gulf energy infrastructure sent gas prices up and Bank of England officials signalled that rates might have to rise. The two-year yield closed 30 basis points higher at 4.107%.

Leaving aside the 2022 mini-budget, it was likely the worst day for short-dated gilts since Black Wednesday in 1992, according to a Reuters analysis. Thirty-four years on, 16 September 1992 is still the benchmark for a British market shock.

Thirty years on, the pound falls again Crisis

On the 30th anniversary of Black Wednesday, sterling fell to its lowest level against the dollar since 1985. A week later, Kwasi Kwarteng’s unfunded ‘mini-budget’ triggered a gilt-market crash, and the Bank of England stepped in on 28 September to buy long-dated bonds and protect pension funds.

The comparison was everywhere, but the mechanics were different: in 2022 the pound floated and the Bank’s job was to stop a bond-market spiral, not defend a fixed rate.

Britain leaves the EU Aftermath

The UK left the European Union after the 2016 referendum. Brexit was a separate political process, but historians often trace the depth of Conservative Euroscepticism back to Black Wednesday, when European monetary co-operation was blamed for recession and humiliation.

The secret files are released Aftermath

After a request by the Financial Times under the new Freedom of Information Act, the Treasury published its internal papers on Black Wednesday. They put the cost to the taxpayer at about £3.3 billion, far below some earlier estimates, and showed how badly official forecasts of the economy had gone wrong in 1992.

No return: independence and the euro tests Policy

Labour won a landslide on 1 May 1997, ending 18 years of Conservative government. Five days later, Chancellor Gordon Brown gave the Bank of England operational independence to set interest rates to meet the inflation target.

In October 1997 Brown set five economic tests for joining the euro. The Treasury’s June 2003 assessment found four had not been met, and Britain never joined. The euro had launched on 1 January 1999 without it.

The ERM is loosened to survive Crisis

A second wave of attacks hit the French franc and other currencies in the summer of 1993. European finance ministers responded by widening the ERM bands from 2.25% to 15% either side, so loose that the system no longer behaved like a fixed-rate regime. It survived only as a stepping stone to the euro.

Lamont is sacked Aftermath

Eight months after Black Wednesday, John Major replaced Norman Lamont with Kenneth Clarke. In his resignation speech in the Commons on 9 June, Lamont said the government gave the impression of being ‘in office but not in power’. Earlier that spring he had said of the ERM exit, ‘Je ne regrette rien’.

Rates fall to 6% Rates

Freed from the ERM, the government cut interest rates fast. Base rates fell by a percentage point on 22 September, then again on 16 October and 13 November, reaching 6% by 26 January 1993, against 10% before the crisis and 15% announced at its height.

The pound kept falling at first, to a low of DM2.3709 on 5 October, before steadying around DM2.50 later that month, according to the Bank of England.

Britain adopts an inflation target Policy

With no exchange-rate anchor left, Lamont wrote to the Treasury Committee setting an explicit inflation target of 1% to 4%. The Bank of England began publishing an Inflation Report, and the Chancellor and Governor began regular monthly meetings with published minutes from 1994.

It was the start of the framework Britain still uses: today’s target is 2% on the consumer prices index, set by an independent Bank of England.

France votes a narrow ‘yes’ Event

French voters approved the Maastricht Treaty by a margin of about 51% to 49%, the ‘petit oui’. The result kept the single-currency project alive, but was too close to settle the markets. Speculators turned on the French franc, which survived with heavy support from the Bundesbank.

The morning after Aftermath

The cancelled 15% rise never took effect, and the 12% rate set on 16 September was reversed: base rates were back at 10% on 17 September. Italy pulled the lira out of the ERM the same day, and Spain devalued the peseta by 5%.

Britain leaves the ERM Crisis

That evening, after an emergency meeting of ministers and a request to fellow ERM members, Chancellor Norman Lamont announced that Britain was suspending its membership of the ERM and that the rise to 15% would not go ahead. Sterling was left to float.

The Bank of England’s own history records that the next day’s rise to 15% was cancelled and that the crisis cost the Treasury over £3 billion.

15% announced, and ignored Rates

In the early afternoon, with the 12% rate making no difference, the government announced a further rise to 15%, due the following day. It was meant to show that Britain would pay any price to stay in. Traders concluded the opposite: no government in a recession could keep rates there for long. Selling continued.

The Bank of England buys, rates go to 12% Crisis

From the start of trading the Bank of England bought pounds in huge amounts, with foreign reserves, to hold sterling above its floor of about DM2.78. One widely used estimate puts the intervention at about $22 billion. When that failed, the base rate was raised from 10% to 12% in the late morning, the first rate change of the day.

The Bundesbank remark Pressure

On the evening of 15 September, comments by Bundesbank President Helmut Schlesinger were reported suggesting that a more comprehensive realignment of ERM currencies would have been better than the lira’s devaluation alone. Markets read that as confirmation that the pound was next. Overnight and into the morning, the selling became overwhelming.

The lira is devalued Pressure

Over the weekend, Italy agreed a 7% devaluation of the lira within the ERM, and on 14 September the Bundesbank made a small cut in its interest rates. It was not enough. The realignment showed that ERM rates could be changed, and investors turned to the next weakest currency: sterling.

Pressure builds on the pound Pressure

Danish voters rejected the Maastricht Treaty on 2 June 1992, raising doubts about the single currency. In July the Bundesbank raised its discount rate again to 8.75%. Britain, in recession with base rates at 10%, could not follow without deepening the slump.

On 3 September the government announced it would borrow ECU 10 billion in foreign currencies to strengthen its reserves, and ministers repeated that there would be no devaluation.

Major wins, rates are cut to 10% Rates

John Major won the general election on 9 April 1992 against expectations. In May the base rate was cut to 10%, the last cut ERM membership would allow after a run of reductions from 15% just before entry. Inflation was falling, but the recession had not ended and house prices were still dropping.

Britain joins the ERM Event

Britain took sterling into the ERM, announced on 5 October and effective on 8 October, at a central rate of DM2.95 with a wide 6% band. Chancellor John Major argued that a link to the Deutschmark would bring discipline to British inflation, then near 10%. Within weeks he had replaced Margaret Thatcher as Prime Minister, with Norman Lamont as his Chancellor.

Critics said the rate was too high, and the timing poor: Germany had reunified on 3 October 1990 and was about to need high interest rates while Britain slid into recession.

Europe launches the ERM Event

The ERM began operating on 13 March 1979 to limit swings between European currencies. Members kept their currencies within bands around central rates, defended by central-bank intervention and interest rates. In practice the Deutschmark became the anchor. Britain stayed out for more than a decade.