A man threatened to stab a teenager for his bike on a train as they travelled into Romford station.

Now British Transport Police (BTP) detectives have released a CCTV image of a man they would like to speak to following the incident which took place on the Liverpool Street to Shenfield line, at around 12.15am, on Thursday, August 8.

Det Con Michael Hatcher, the investigating officer, said: “The victim, a 16-year-old boy from Hackney, boarded the train at Liverpool Street around 11.55pm with his bike.

“Just before the train arrived into Romford, a man came through the train, approached the victim and demanded him to hand over his cycle.

“He threatened that he would stab him if he did not hand over the bike, worth around £200.

“Fearing for his safety, the victim backed down and the man left the train at Romford station with the victim’s bike.”

The victim stayed on the train until Harold Wood, where he left and called police.

Officers are carrying out an investigation and are keen to hear from anyone who may have any information about the robbery.

DC Hatcher added: “The image we have obtained from CCTV is very clear – if you recognise him or know his whereabouts, please contact police.”

Anyone with information is asked to contact British Transport Police on 0800 40 50 40 quoting background number B11/LNA of 05/09/2013. Information can also be passed to the independent charity Crimestoppers, anonymously, on 0800 555 111.