Unisex changing rooms are more dangerous for women and girls than single-sex facilities, research by The Sunday Times shows. Almost 90% of reported sexual assaults, harassment and voyeurism in swimming pool and sports-centre changing rooms happen in unisex facilities, which make up less than half the total.

Gender-neutral changing is growing as councils seek to cut staff costs and cater to transgender people. But one MP said it risked becoming a “magnet” for sex offenders and increased the danger to women and girls.

At least two-thirds of all sex incidents in public pools and leisure centres, whether inside or in the grounds, happen in unisex changing areas. Only a handful occur in single-sex changing rooms, the figures, released under freedom of information (FoI) laws, show.