A group of schoolboys were forbidden from wearing shorts in lessons - so, during last week's heatwave, they took to coming to school in skirts instead.
Longhill High School in Rottingdean, close to Brighton, punished a number of boys earlier in the week for wearing shorts, which staff said were not an approved part of school uniform.
Head teacher Kate Williams told The Argus: "Students have access to water in order to keep themselves hydrated. We have made reasonable steps to ensure that classrooms are as comfortable as possible.
"I have high standards regarding uniform, and today, in the warm weather conditions, these high standards have been challenged by approximately two per cent of parents/students."
The following day four Year 9 students, Michael Parker, Kodi Ailing, George Boyland and Jesse Stringer decided to stand up against the ban by wearing girls' school skirts.