WALTON swimming pool was closed for cleaning after a child fell ill in the water.
The youngster became ill in the pool while on a school visit on Tuesday.
The swimming pool was closed for the rest of the day while the water was cleaned and treated, before reopening the following day.
Frinton Primary School headteacher Joan Dear said: “The student was not ill beforehand.
“We have a 48-hour ruling that prevents pupils coming back to school until they are better following an illness. It was just an unfortunate incident.”