Brexit isn’t a new Black Wednesday. It’s far darker than that

This autumn marks the anniversaries of two notable economic humiliations. But they are as nothing to what might happen if we leave the EUThis is quite an anniversary year for great British economic disasters. Last weekend saw the 25th anniversary of the ignominious exit of the pound from the European exchange rate mechanism – “the first Brexit”, and, I still hope, the only one.Then this November will see the 50th anniversary of the dramatic 14% devaluation of the pound –