The story seems to be about England, but the monitors are being rolled out to other areas as well by the other departments. For example, Northern Ireland [0], and Scotland [1],[2]. It's anecdotal, but the monitors have started to arrive in my kids schools here in Northern Ireland.

[0] - BBC News - https://www.bbc.co.uk/news/uk-northern-ireland-58790302

[1] - Scottish Parliament Report - https://www.parliament.scot/chamber-and-committees/committee...

[2] - Scottish COVID guidance for schools - https://education.gov.scot/media/ttkbrnde/reducing-risks-in-...

(edited to break up the links)