The BBC are reporting http://www.bbc.co.uk/news/uk-england-kent-41069085
'Emergency services have evacuated a beach in Sussex after a suspected chemical leak.
People on the beach at Birling Gap reported painful, stinging eyes and breathing difficulties after a "mist" appeared.
Sussex Police said there was an "unknown haze coming in from the sea" affecting the East Sussex coastline.'
Chemical leak or chemical attack? What do you think?