A perverted married father-of-two has admitted pleasuring himself in front of women travelling on the Metropolitan Line on three separate occasions.

Devadas Ronald-Uthayakumar, 48, first struck when he openly played with himself after he boarded a train between Northwick Park and Pinner station shortly before 10pm on March 20 last year.

Stella Waata, prosecuting, told Hammersmith Magistrates Court: “While doing so he used his bag to block his actions from other passengers in the carriage while still exposing himself to her.

“The complainant made an attempt to film actions on her mobile phone. This was partly successful in that she managed to film his actions but not his face.”

He targeted his second victim at midnight between Harrow-on-the-Hill and Northwood station.

A week later he exposed himself to another female passenger between Euston Square and North Harrow station just before midnight.

Ms Waata said: “He sat opposite the victim and then proceeded to cover his lap with a bag and used it to block the view of the other female sitting next to him.”

He was photographed by the woman before fleeing the scene with his manhood exposed.

He pleaded guilty to three counts of outraging public decency and has been warned he could be sent to jail.

District Judge Karim Ezzat told him: “There was a degree of sophistication in as much as you were trying to conceal your actions from others while targeting individuals on trains.

“I take the view that the powers of this court are insufficient for sentencing, therefore I will commit your case to Isleworth Crown Court.”

Uthayakumar, from Pinner, will be sentenced on April 28.