A train passenger may have been left with permanent nerve damage after a brutal attack on a platform at King's Cross.

The 42-year-old victim was seeing off a friend on platform 6 in December when he was targeted in a seemingly unprovoked attack.

Officers from the British Transport Police today released an image of a man they want to talk to about the incident.

Detective Constable Dean Percival said: “The victim was seeing a friend on to a King’s Cross to Cambridge train on platform six when he was attacked.

“He was punched in the face and pushed into the train carriage sustaining cuts and bruises to his face.

“The attack loosened two of his front teeth, and it is feared he may have sustained permanent nerve damage.”

The assault took place at King’s Cross station at around 12.20am on Saturday, 12 December. After reviewing CCTV, officers believe the attacker left the train on platform six prior to its departure.

Police believe attacker may have connections to the Hitchin, Letchworth or Stevenage areas.

DC Percival added: “I would like to reassure the public that violent incidents like this are rare on the rail network. I would also like to appeal for anyone with information to get in touch.

“I think the person in the image has information which could prove useful to our investigation.”

Anyone with information is asked to contact British Transport Police on 0800 40 50 40, or text 61016, quoting reference ESSUB/B7 of 13/1/16. Information can also be passed anonymously to the independent charity Crimestoppers on 0800 555 111.