BBC News has story about errors in exam sheets made it impossible for studens taking exam to solve problem. Error was discovered in Hong Kong 8 hours before exam was given in UK. Exam company was notified, but kept information from UK officials. In describing the problem in the exam room, what in US would be called "monitors" were called "invigilators".

"As the maths candidates were asking the invigilators what they should do and the invigilators were conferring, the geography candidates were indirectly affected by this as
it caused us a great deal of disruption," he said.

Not a word for US to borrow from the UK.