If I'm not mistaken, the Delta variant hit the UK before it hit here.
https://www.imperial.ac.uk/news/224113/coronavirus-infections-rising-exponentially-england-react/
“
We found strong evidence for exponential growth in infection from late May to early June in the REACT-1 study, with a doubling time of 11 days on average for England.
These data coincide with the Delta variant becoming dominant and show the importance of continuing to monitor infection rates and variants of concern in the community.”