Thank you for your response. This article is part of a monthly series of articles that we publish with our Knowledge Partners at Euromonitor. We have forwarded your response to them and this was their response:
The article was written after the US election when the exchange rates went down initially. Therefore the issue has to do with the time that the article was written re: the exchange rate. The forex trend was still uncertain at the time at the time of writing, having shown a decline in the immediate days after the vote, and then it gradually picked up, but not for the $-GBP.
All arguments that Caroline based the analysis on come from previous data and/or forecasts from the Macro Model, analytic tool that Euromonitor has been developing.