teuchter
je suis teuchter
You'd have to also look at what TfL did to mitigate - and I think they did quite a lot relatively rapidly. It's likely that some of those bus drivers became infected well before the lockdown when everyone was going about business as usual. And what were TfL's other options post lockdown - stop operating services altogether?Hard to prove conclusively perhaps, but if they've been isolating except when working it will be most likely that's where they've caught it.
And aren't civil cases decided on a balance of probability?