Overview
- All three students stayed in hospital overnight and are now home, according to Lord Williams's School in Thame.
- Thames Valley Police were informed and are supporting the school, the headteacher said.
- Local reports say a pupil and classmates allegedly added copper sulphate to water bottles after a science lesson because of the colour.
- An anonymous source reported that parents were unhappy about the incident, with one parent contacting police.
- The Independent cites public health guidance that ingesting copper sulphate typically causes gastrointestinal irritation, including nausea and vomiting, and Thames Valley Police did not provide a public comment on Monday.