The plunging pound may cause British holidaymakers to choke at the prices if and when they next choose to go abroad. But one slice of the travel industry is seeing a silver lining in the storm clouds. Tour operators catering for visitors are quietly calling it their best month for bookings since October 2019 as US tourists take advantage of sterling’s tumble. Gathering at a conference in Aberdeen this week, there was renewed optimism from executives whose businesses were battered during the pandemic. Joss Croft, the chief executive of UKInbound, said the economy was a huge topic of conversation in a sector that “has had its own recession for the…