An Essex school was evacuated this morning following a chemical spill.
Some 800 pupils were evacuated unharmed from Shenfield High School, Hutton, but one member of staff and two other people were treated after breathing in fumes.
Fire crews from Brentwood, Harlow and Basildon were called to the incident, which involved a five-litre tank of poly aluminium chloride.
The chemical mixed unintentionally with chlorine but was confined to a plant room on the site.
The 42-year-old male staff member and two others suffered the affects of chlorine inhalation.
Specialist officers, trained to deal with chemicals, were also sent to the scene
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