The 860-pupil academy is also banning mobile phones because of 'FOMO' - Fear of Missing Out. They say the constant pressure to have fun is taking a toll on teens' mental health.

Deputy headteacher Cindi Pride said: "There have been many reports about how excessive use of social media can have a negative impact on mental health, particularly for girls.

"And the situation is getting worse. It can have a real impact on self-esteem with people comparing themselves to others.

"We are also banning FitBits and smartwatches.

"These monitor the number of calories burned and we found that some girls would monitor the number of steps they had taken and the number of calories they had used.

"If they didn't feel they had taken enough steps in the morning they wouldn't eat lunch." She added: "We don't need our girls to be counting calories.