Public Transport company cancels hundreds of journeys.

In BE's case it was (from the article) due to workers calling in sick. Quite different. The former seems to be a one-off screw-up, the latter premeditated as usual.

Calling in sick on foot of introducing new rosters without agreement, or with the intent of entering discussions.
The rosters are currently temporary, due to be introduced permanently on Oct 29. It would appear, again from the outside looking in, that if management agree to discussions about new rosters, then disruption will end.

O'leary alluded to a similar approach when the notion of pilots calling in sick was being speculated on