A 23-year-old woman sexually assaulted on a train to work, is today launching a campaign for all carriages to have CCTV. The communications executive was groped and assaulted on a packed commuter train on London's Central Line, as she travelled just after 8am on Tuesday, March 19.

She attempted to chase her attacker when she arrived at Liverpool Street station and to take a picture of him on her mobile phone, before reporting the incident to station staff and police.

The woman was shocked to be told that the Underground line is one of the few in the capital not to have CCTV on its carriages to provide police with film evidence to track down sex attackers.

A petition she is launching on the Government’s official website, reads: “With no CCTV cameras in carriages on Central line trains, I am left without evidence against my perpetrator.

“To stop this from happening to anyone else who has, or ever will, travel on central line trains, I am campaigning for Transport for London to install CCTV to keep the public safe while they travel.

“This will both encourage more victims to report the crime with the knowledge that they have evidence, as well as hopefully, stop offenders from their predatory behaviour.”