An English prison is keeping lesbian inmates from rooming with each other.

A report from Her Majesty’s (HM) Chief Inspector of Prisoners made the policy public from HM Prison Peterborough, according to PinkNews. The facility, run by French management company Sodexo, houses nearly 400 female inmates.

“A managing relationships policy set out guidelines for women in relationships, outlining what was acceptable and what was not,” the report said. “Women in relationships could apply to be in the same unit but not in the same cell.”

According to statistics gathered from inmate interviews, six percent of the prison population are lesbian while 11 percent are bisexual. There was no explanation on how the policy is enforced, according to PinkNews.