Mystery remains over chemical haze that hit East Sussex coast

Theories include toxins from algal blooms and accidental discharge from a water plant though true cause still unclear

The chemical cloud that left beachgoers on the East Sussex coastline with stinging eyes, sore throats and even vomiting on Sunday remains a mystery, with officials saying it is unclear what caused the haze or what it was composed of.

Experts have put forward a number of possibilities, ranging from accidental discharges of chemicals at water treatment plants to toxins from algal blooms.