British Transport Police detectives are appealing for information after a man was assaulted while travelling on a Metropolitan line train between Wembley Park and Preston Road.
Police have released CCTV of two men they would like to speak to in connection with the incident, which happened on Wednesday, 30 May around 2.30pm.
Detective Constable Keith McEwan said that the victim, a 34-year-old man from Eastcote, boarded the train at Wembley Park station.
“As the train approached Preston Road, a man walked over to the victim and unsuccessfully tried to snatch his mobile phone before him several times in the head.
"Another man then joined in the attack and headbutted the victim. The two men then left the train at Preston Road station.”