Beachgoers left struggling to breathe after mystery incident at Essex seaside

A mother said one of her daughters told her it 'hurt to breathe in' while the other was 'gasping and couldn't form words'.

Beachgoers left struggling to breathe after mystery incident at Essex seaside
A mother said one of her daughters told her it 'hurt to breathe in' while the other was 'gasping and couldn't form words'.