Key Points
- British Transport Police have released an image of a man they want to speak to in connection with a reported indecent act on a London Underground train.
- The incident is said to have happened at about 5.10pm on Monday, April 20, on a westbound District line service.
- The train was travelling between Wimbledon and East Putney, according to the report.
- Police say the man allegedly exposed himself and openly masturbated in view of passengers before leaving the train at Upney Underground station.
- Detectives believe the man pictured may have information that could help their enquiries.
- The man in the image is described as Caucasian, with brown beard and hair, and wearing a blue hooded jacket.
- Anyone who recognises him has been asked to contact British Transport Police by texting 61016 or calling 0800 40 50 40, quoting reference 773 of 20 April.
Wimbledon (The Londoner News) May 7, 2026 – British Transport Police are appealing for information after a man allegedly exposed himself and masturbated in front of passengers on a District line train, with officers releasing an image of a person they want to question as part of the investigation.
What do police say happened?
As reported by British Transport Police, the incident occurred at around 5.10pm on Monday, April 20, on a westbound District line service. Police say the man was seen by passengers exposing himself and masturbating in full view before getting off at Upney Underground station.
The force has not identified the man publicly and has asked the public for help in tracing him. Detectives believe the image they have released could lead to someone recognising the suspect or offering information that helps the inquiry.
What does the released image show?
Police describe the man pictured as Caucasian, with brown hair and a brown beard, wearing a blue hooded jacket. That description has been shared alongside the appeal so passengers or members of the public may be able to identify him. The image release is part of a wider effort by British Transport Police to gather witness information and progress the case.
Why is British Transport Police appealing now?
British Transport Police often issue public appeals when investigators need help identifying a suspect or building a timeline from witness accounts. In this case, the allegation involves behaviour said to have taken place in a carriage with passengers present, making witness identification especially important. The release of an image suggests detectives have exhausted immediate lines of enquiry and are now seeking public assistance.
What should witnesses do?
Anyone who recognises the man is being asked to text British Transport Police on 61016 or call 0800 40 50 40. The reference number to quote is 773 of 20 April. The appeal also points people to Crimestoppers on 0800 555 111 if they wish to pass information anonymously.
How serious is the allegation?
The allegation concerns indecent behaviour on public transport, which can be distressing for passengers and disruptive to the safe use of the railway. Because the incident reportedly took place in front of other passengers, the case has a public safety and public decency dimension as well as a criminal investigation element. Police have not said whether anyone was physically harmed, and no further details about passengers involved have been released.
What is the wider context?
Transport policing appeals like this are often based on CCTV or still images when officers need help identifying a suspect seen on a train or platform. The current case fits that pattern, with investigators asking commuters and the wider public to come forward if they recognise the man. For now, the case remains an allegation under investigation, and police are treating the image appeal as the main route to progress the inquiry.
