I know this is not Dawlish specifc, but I couldn't believe this actually happened.
Then astonished that no criminal proceedings were not taken!
Also this didn't seem to get on the TV news.
If you want to read the entire article:-
http://www.dailymail.co.uk/news/article-2620336/Teacher-narrowly-avoids-drinking-coffee-poisoned-ten-year-old-boys.html
It was on Radio 4 at the weekend - I got the impression that the police were involved but could be wrong.
Irrespective - my opinion is that any pupil (or staff!) action with a serious H&S threat must be handled by the police.
Dealing with it internally just down plays it's seriousness to other pupils, plus schools have a vested interest to try to 'bury bad news' - which in my day was all too often their first course of action.