Officers investigating two cases of indecent exposure on Merseyside public transport have released two images of a man they'd like to speak to.
A man inappropriately touched himself while travelling on a train service between Hamilton Square and Bache, at 2.55pm on August 10.
He moved to sit directly across from a young woman before performing the act.
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On another occasion, some weeks later, at around 3.11pm, on October 1, a man reportedly touched himself through his trouser pocket while travelling between Southport and Moorfields.
Officers are appealing for information about the man pictured in these images, as they believe he has information which could help their investigation.
A spokesperson for the British Transport Police said: "Do you recognise this man? Officers investigating two indecent exposure offences near Liverpool are today releasing images in connection.
"At 2.55pm on 10 August, a man sat across from a young woman on a service travelling between Hamilton Square and Bache moved to sit directly opposite her and touched himself inappropriately.
"On another occasion at 3.11pm on 1 October, a man was reported to be touching himself through his trouser pockets while travelling on a train between Southport and Moorfields.
"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 349 of 01/10/21.
"Alternatively, you can contact Crimestoppers anonymously on 0800 555 111."
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