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A man threatened to throw a train staff member onto the tracks prompting police to launch an investigation.
The altercation broke out between a man and a train enforcement officer on Sunday at Greenhithe station.
The man violently threatened them, saying that he was going to throw them onto the tracks at around 7pm.
CCTV images have now been released of a person officers wish to speak to.
Officers believe the man in the images may have information which could help their investigation.
If you recognise him, or have any information, please contact BTP by texting 61016 or calling 0800 40 50 40 quoting reference 441 of 24/04/22.
Alternatively, you can call Crimestoppers anonymously on 0800 555 111.