Serial flasher jailed after targeting lone women on London Underground

A 30-year-old man who exposed himself to lone women as they travelled on the London Underground network has been jailed.

Matheus Prestes, of no fixed address, pleaded guilty to eight counts of exposure at a court hearing in November 2025.

On Friday 13th February at Inner London Crown Court, he was sentenced to eight months’ imprisonment.

The court heard how Prestes embarked on a spree of sexual offending, targeting lone women travelling on the Bakerloo line.

His first reported incident took place at around 7pm on Saturday 21st June 2025, when he stepped off a Bakerloo line service at Baker Street, stood on the platform, and exposed himself while staring at a woman sat on board the train.

Only days later, on Wednesday 25th June, he again exposed himself and began masturbating in front of another woman on a southbound Bakerloo line service. When she told him she was reporting his actions to the police, he quickly got off the train at Edgware Road.

On Sunday 6th July, at around 6pm, Prestes targeted another lone woman on a Bakerloo line service near Kenton. After exposing himself on board the train, he got off, stood on the platform, and stared at her while masturbating.

Then, on Tuesday 5th August, he walked along a Tube carriage before he exposed himself to a woman near Lambeth North. Later that month, on Friday 22nd August, another woman reported that Prestes had exposed himself to her between Oxford Circus and Waterloo before masturbating in her eyeline and leaving the train.

On Saturday 11th October he targeted three women in a day, again on Bakerloo line trains. On each occasion he exposed himself to a lone woman and immediately got off the train.

BTP officers identified Prestes as the man responsible for the series of offences, and he was arrested.

In police interview he admitted he offended because he ‘felt like doing it’, telling officers the adrenaline rush motivated his repeated behaviour.

BTP Sergeant James Ashby said: “Prestes repeatedly targeted women on the London Underground in deliberate and predatory acts. His behaviour was disturbing, persistent, and entirely unacceptable. It is down to these brave women reporting these incidents that we were able to piece together his spree of offending and put him behind bars.

“This sentence reflects the seriousness of his actions. Passengers can be reassured that we will always take reports of sexual offences seriously, act quickly to identify offenders, and work tirelessly to bring them before the courts.

“If you experience or witness a sexual offence on a train or at a station, please report it by texting 61016. In an emergency, always call 999. We take every report seriously and will stop at nothing to bring sexual offenders like Prestes to justice.”

This article was published by the British Transport Police on 27/02/2026 and can be viewed at https://www.btp.police.uk/news/btp/news/in-the-courts/jail-for-man-who-exposed-himself-to-lone-women-on-the-tube---london/