A woman was assaulted by her partner on board a train travelling between Waterloo and Stains.
The man punched the woman in the stomach and threw her to the ground.
Police are looking to speak to witnesses of the assault which happened on June 14 at around 11.50pm.
The Waterloo and Staines Southwestern Service travels through Wandsworth, Richmond and Twickenham.
If you have any additional information, contact BTP quoting reference number 300 of 15/06/22.
A spokesperson for British Transport Police said: “Officers investigating an assault on-board a train travelling between Waterloo and Staines stations are appealing for witnesses or anyone with information.
“At around 11.50pm on Tuesday 14 June, a woman was punched in the stomach and thrown to the floor by her partner.
“Officers are keen to speak to any witnesses or anyone with information to assist their investigation.
“If you witnessed this incident, or have any information, please contact BTP by texting 61016 or calling 0800 40 50 40 quoting reference 300 of 15/06/22.
“Alternatively, you can call Crimestoppers anonymously on 0800 555 111.”
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