Women travelling on the London Underground are being urged to report sexual assaults in a new initiative.

Transport for London has launched a campaign to tackle abuse on public transport, with a video in which a female commuter is groped while on the Tube.

The uncomfortable footage - which uses actors - sees the woman hounded by an increasingly persistent male, who looks her up and down, gets on to the same train carriage and then gropes her.

Scroll down for video

Unsettling: Transport for London has launched a new campaign to tackle sexual assault on public transport, with a video in which a female commuter is groped on The Underground

Every time the man steps up his creepy efforts, the narrator - Broadchurch actress Olivia Coleman - asks: 'Would you report it?'

After the man, who is clearly wearing a wedding ring, gropes his victim, she moves to a separate part of the carriage, only for him to shuffle up behind her.

'He pushes his groin right into you,' the narrator says. 'Would you report it?'

According to TLC, one in ten Londoners have experienced unwanted sexual behaviour on public transport, but 90 per cent of these incidents go unreported.

The campaign’s website reads: 'You can report anything of a sexual nature, including rubbing, groping, masturbation, leering, sexual comments, indecent acts, or someone taking photos of you without your consent.'

The uncomfortable footage - which uses actors - sees the woman hounded by an increasingly persistent male, who looks her up and down, then gets onto the same train carriage as her

Every time the man steps up his creepy efforts, in this case groping her rear, the narrator - Broadchurch actress Olivia Coleman - asks, 'Would you report it?'

TLC states: 'You don’t have to prove that it was a criminal offence or intentional to report it, we can investigate that for you.

'No incident is too small or trivial. Our officers are trained to deal with these sort of cases. We will treat you with respect and dignity.

'You will always be believed and you will always be taken seriously.

The man, who is wearing a prominent wedding ring, continues to find excuses to move closer to his victim

According to TLC, one in ten Londoners have experienced unwanted sexual behaviour on public transport, but 90 per cent of these incidents go unreported

Speaking about the campaign, British Transport Police assistant chief constable said: 'We want the travelling public to feel confident that we take every sexual incident seriously no matter what has happened.'

The video, entitled Report It To Stop It, is part of TfL's Project Guardian initiative, which was launched two years ago.