Two building contractors working on the Essex infant school which went up in flames have been treated by the ambulance service.
The workers at the John Ray Infant School in Braintree were treated by paramedics yesterday (Saturday) for the affects of breathing in smoke.
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The employee was sorting through rubbish at waste company Amey's Waterbeach facility.
Ice is expected to form on some surfaces from late Tuesday afternoon and last overnight into Wednesday morning.
Ian Tang was last seen at 2.30am on Sunday leaving the KA club in North Walsham.