After Britain’s new prime minister, Liz Truss, announced her plan for tax cuts, the value of the country’s currency plunged. Now the exchange rate between the U.S. dollar and the British pound is outrageously good for American travelers. The dollar is now worth about £.90. That’s almost one for one. Considering that the pound was worth around two dollars as recently as the 2006-2008 period, that means the dollar has more buying power now in Britain than at almost any time in memory.