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What analysts are saying.
Peter Escho, co-founder of investment firm Wealthi, told the BBC: "All currencies are getting sold off against the US dollar, so there is a large element of US dollar strength."
Trading volumes in Asia have also been low which can make movements in currency trading appear more pronounced.
However Mr Escho said: "But with the pound, it has really been exacerbated by news that the new government will be cutting taxes, which is inflationary.
"Add to that recent energy subsidies and news that the Bank of England might need to have an emergency rate-hike meeting, this all results in a sense of panic."
Jane Foley, a currency strategist at Rabobank, said the sell-off showed investors had doubts about the government's plans.
"They're worried that some of these tax cuts that have been announced aren't going to be fully-funded. That will result in a large amount of debt at a time when the Bank of England is going to be selling some of its holdings of UK government debt."
Stephen Innes, managing partner at SPI Asset Management told the BBC that the Bank of England will be forced to take emergency action.
"To stop the bleeding even temporarily, the Bank of England may well enter 'whatever it takes' territory to bring inflation down. An emergency meeting rate hike could happen as soon as this week to regain credibility in the market. We could even see a hike today."
Yet the Tory fanboys on here have been telling us that all of this is ‘a good thing’?
Laughable.