After a weekend where the markets digested the Kwasi Kwarteng plan for growth, the pound hit $1.03 in early trading in Asia – the lowest rate since the dollar was invented in 1792. The fall was shortlived – it later rebounded to $1.07 – but the fact that it touched such a low at all has set off speculation that the Bank of England will stage an emergency intervention putting up interest rates by as much as one percentage point.