According to that article this is being driven almost entirely by hospitalizations in the 70+ population. That group is nearly 100% double vaccinated in Scotland.

What you are seeing here is classic Simpson's Paradox. It is exactly the same thing we saw earlier with Israel with delta. Here was an article on that which covers how Simpson's Paradox works in that situation [1].

[1] https://www.covid-datascience.com/post/israeli-data-how-can-...