Stantonbury International School has confirmed that all students in Year 7 and Year 8 must now self-isolate due to cases of coronavirus within the school.
On Monday (14/9), the school was forced to temporarily close after they discovered a Year 8 pupil had come down with the virus.
Everybody was sent home with a letter explaining that students in Year 8 must self-isolate for two weeks, while other students could return to school once a deep clean had taken place.
The school only reopened yesterday (15/9) but has now sent home hundreds more students and partially closed the school to Year 7 pupils now too.
These children may have been in contact with the affected child, says the school, so must now remain at home until the end of the month.
A letter sent to parents today reads: "We have been advised by Public Health England that there has been a confirmed case of COVID-19 within the school. We have followed the national guidance and have identified that your Year 7 child has been in close contact with the affected child. In line with the national guidance we recommend that your child now stay at home and self-isolate until Wednesday 30th September.
"We are asking you to do this to reduce the further spread of COVID 19 to others in the community. If your child is well at the end of the 14 days period of self-isolation, then they can return to usual activities. Other members of your household can continue normal activities provided your child does not develop symptoms within the 14-day self-isolation period."