@MRex
Sensible heads, my cleaner is still "waiting to see" to be vaccinated and has a secondary pupil son... She wears a mask and mostly keeps distance in other rooms, but occasionally pass in corridors. How likely are we to be asked to isolate if she gets covid?
I think it depends on what she says to Track and Trace. If she tells them you were a close contact, even if you were never in the same room as her and had all the windows open anyway, there is no arguing with them; you are legally obliged to isolate.
Myself, I wouldn't say you were a 'contact' in the scenarios you describe, but her understanding, specially if pressed by T&T, may be different.
The system is open to malicious claims that someone was a close contact.