Back in April last year, TfL launched a campaign to encourage people to report unwanted sexual behaviour on public transport. And it was well overdue – according to the British Transport Police, sex offences on trains and at stations have risen 25 percent since 2014. Since the campaign launched, 1,603 reports were made to the police between April and December 2015, compared to 1,117 in the same period in 2014–- an increase of 36 percent. And that's not all – the increase in reporting of these incidents has lead to a 40 percent rise in arrests. Of course, it just could be that there's been an increase in incidents of unwanted sexual behaviour – but let's hope that's not the case.