Should we be concerned? Are they hiding something?
More likely they've found another "source" of tests to tack onto the figure - some sent abroad and recently returned perhaps?
Bearing in mind the behavioural scientists' infamous remark about people not feeling sufficiently threatened, I've said before that I'd half-expect something like this in advance of this weekend's relaxations, just to keep people in line
"A substantial number of people still do not feel sufficiently personally threatened ...The perceived level of personal threat needs to be increased among those who are complacent, using hard‐hitting emotional messaging based on accurate information about risk"
Source: onlinelibrary.wiley.com/doi/10.1111/bjhp.12428