circumstances

Under the treaty, "there are no circumstances under which Ukraine as a state party may acquire, stockpile or use them", she added.

Ms Allen-Wyatt admitted she had to cancel "some sessions" due to circumstances outside of her control, and apologised to those affected.

In most circumstances, the sound medical advice is to disengage from the source of stress, therapists said.

C-sections can save lives in some circumstances but also have a higher risk of hemorrhage, the office said.

And, of course, the circumstances of each incident are unknown.