Officers investigating an assault at Romford railway station are releasing CCTV images in connection.
At around 4.30pm on 26 April, the victim, a 68-year-old man, was walking through the station when a boy knocked his hat off.
Two other boys then approached the victim and punched him in the face, causing him to fall to the ground.
All three boys then ran out of the station.
Officers believe those in the CCTV images may have information that could help with their investigation.
Anyone who recognises them is asked to contact BTP by texting 61016, or by calling 0800 40 50 40 quoting reference 285 of 27/04/23.
Information can also be given anonymously to Crimestoppers on 0800 555 111.
