A Suffolk secondary school has banned girls from wearing skirts because their hemlines were getting too short.
The Equal Opportunities Commission says students may have a case
Governors at Kesgrave High School, near Ipswich, have ordered female students to wear trousers after girls turned up for lessons in mini-skirts.
The school's head said some of the skirts were so short they were impractical as well as immodest.
The Equal Opportunities Commission says students could have a case for unlawful sex discrimination.
The girls could claim they had been denied normal dress options, it was suggested.
Earlier this month, a male student at Ringmer Community College in Lewes, Sussex, wore a skirt to college in protest at "sexist" school uniform rules.