It was a day to remember: 20 years ago, on 27 October 1986, Big Bang caused a revolution in the securities market which turned the whole financial sector upside down.
The early 1980s was a time of change. The Thatcher government’s thirst for deregulation was at its height. Exchange controls had been lifted, capital could be invested anywhere, nationalised industries were being privatised and restrictive practices were being crushed.

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