Black Wednesday

The prelude

When the ERM was set up in 1979, Britain declined to join. This was a controversial decision as the Chancellor of the Exchequer Geoffrey Howe, despite his economically 'dry' credentials, was a convinced pro-European. His successor Nigel Lawson was also a believer in a fixed exchange rate, and although he was a mild Eurosceptic he admired the low inflationary record of Germany, attributing it to the strength of the Deutsche Mark and the management of the Bundesbank. Thus although Britain had not joined the ERM, for several years the Treasury followed a semi-official policy of 'shadowing' the Deutsche Mark.

At the same time, and in addition to open market trading of currencies, the Treasury's main tool in attempting to control the exchange rate was through the setting of the value of Sterling. As a consequence, interest rates were set with consideration of the domestic demand and inflation environment as only a secondary consideration. This led to a number of years of lower interest rates than would have otherwise been the case, and hence[1] to rising inflation.

Matters came to a head in a clash between Margaret Thatcher's economic advisor, Alan Walters, and Lawson, when Walters claimed that the Exchange Rate Mechanism was "half baked". This led to Lawson resigning as chancellor to be replaced by his old protégé John Major, who, with Douglas Hurd, the then Foreign Secretary, pressured Margaret Thatcher to sign Britain up to the ERM in October 1990, effectively guaranteeing that the British Government would follow an economic[2] and monetary policy that would prevent the exchange rate between the pound and other member currencies from fluctuating by more than 6%. The pound entered the mechanism at 2.95 Deutsche Mark to the pound. Hence, if the exchange rate ever neared the bottom of its permitted range, 2.778 marks, the government would be obliged to intervene. With UK inflation at three times the rate of Germany's, interest rates at 15% and the "Lawson Boom" about to bust, the conditions for joining the ERM were not favourable at that time.

From the beginning of the 1990s, high German interest rates, set by the Bundesbank to counteract inflationary effects related to excess expenditure on German reunification, caused significant stress across the whole of the ERM. The UK and Italy had additional difficulties with their double deficits. Issues of national prestige and the commitment to a doctrine that the fixing of exchange rates within the ERM was a pathway to a single European currency inhibited the adjustment of exchange rates. In the wake of the rejection of the Maastricht Treaty by the Danish electorate in a referendum in the spring of 1992, those ERM currencies that were trading close to the bottom of their ERM bands came under speculative attack in the foreign exchange markets by currency speculators.

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