Sexual offences on trains have more than doubled according to statistics released by the British Transport Police .
Reported sexual offences on the railways, which also take into account London Underground, has risen from 651 in 2012/13 to 1,450 in 2016/ 2017.
BTP said although the numbers pose a concern, it is pleased to see victims have the confidence to report crimes following the launch of a new campaign.
Sexual assaults on females aged 13 and higher were among the highest recorded offence with 402 in 2016/17.
Sexual offences on trains per year
For the same offence in 2012/13, 197 cases were reported, marking a 106% increase.
Cases of exposure have only slightly increased over the five year period, rising from 59 to 66, and have dropped from 69 in 2015/16.
Detective chief inspector Darren Malpas said the BTP expected to record a rise in sexual offences when it launched the Report it Stop it campaign.
"Though it is clearly a concern that so many people are affected by this type of crime, it is pleasing that previously reluctant victims of sexual offences now have the confidence to report this to us," he said.
“Tackling all forms of unwanted sexual behaviour on public transport is a priority for British Transport Police and we have worked hard in recent years to send a clear message to victims that they will be taken seriously and we will investigate offences.
“We believe that unwanted sexual behaviour is something that largely goes unreported, which is why we worked with Transport for London, City of London Police and Metropolitan Police to launch the Report it to stop it campaign.
“This is a national campaign encouraging women and men to report unwanted sexual behaviour they experience on public transport."
British Transport Police said it encourages people to report any form of behaviour that makes them feel uncomfortable.
This includes rubbing, leering, sexual comments, indecent acts or more serious sexual assault.
Mr Malpas said: "It is really important that people report any kind of unwanted sexual behaviour to us as soon as possible.
"Time is of the essence so we can exploit all evidence gathering opportunities.
"Every report, with as much detail as possible helps to build a picture of the offender.
“We take every report of unwanted sexual behaviour seriously and our specially trained officers work hard to find those responsible, by speaking with witnesses and reviewing the extensive CCTV available to us on the rail network.
“We introduced a text message service in 2013, providing passengers with a simple and discreet way to report offences to us.
“If you are a victim of an offence, text British Transport Police on 61016.”
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