A petition calling for women-only tube carriages has surpassed 12,000 signatures. It comes amid increased reports of sexual offences on public transport, both in London and beyond.

Supporters claim that giving women the option to travel separately from men will make them safer, and send a message that harassment is unacceptable. Critics argue that this is a backwards step, amounting to segregation. Some say it unfairly stigmatises men.

We hear from the woman leading the campaign, and explore the history of single-sex train carriages in the UK. Does the data show that sexual harassment on trains is on the rise, or are the figures a symptom of increased reporting? What do we know about other public safety campaigns attempting to tackle sexual harassment and violence over the years - and do they point us towards better solutions?

Presenter: Adam Fleming