Covid testing protocol

[TDK mk2]

Does anyone know of a testing protocol in any airline anywhere like this? I won’t say what airline but it’s UK based.

https://cimg2.ibsrv.net/gimg/pprune.org-vbulletin/1707x884/d4d968bf_b27e_4fdc_8b56_7dd26cc448d5_bf58c4433d8ac02d6195ebc 1b31a026bd81485ba.jpeg

[back to Boeing]

We don’t have a requirement to do a test but a test is available if desired.

however how does this requirement fit with a day off being free of all duty?