Owen Flowers, from Walsall, and another man are set to stand trial for the alleged cyber attack in 2024.

A Walsall teenager is set to stand trial today (Monday) accused of carrying out a cyber attack which cost the London transport network millions of pounds.

Owen Flowers will appear alongside Thalha Jubair at Woolwich Crown Court charged with conspiring together to commit unauthorised acts against Transport for London (TfL).

Jubair, 20, from East London, and Flowers, 18, from Walsall, were arrested in September as part of an investigation by the National Crime Agency (NCA) and City of London Police.

Prosecutors said the alleged cyber attack resulted in a £39 million loss for TfL as well as a “loss of livelihood” for people dependant on TfL licences, Westminster Magistrates’ Court heard in September 2025.

The alleged attack posed “significant risk” to the UK economy and London residents, the court was told previously.

Flowers, who was first arrested in September 2024 and then arrested again in September 2025, is also charged with targeting US healthcare firms.

He is accused of conspiring with others to commit unauthorised acts against SSM Health Care Corporation and attempting to commit unauthorised acts to Sutter Health.

Jubair, from Tower Hamlets, east London, faces an additional charge under the Regulation of Investigatory Powers Act (Ripa) of failing to disclose the Pin or passwords of his devices.

Transport for London identified that there had been a cyber attack on September 1 2025, in which customer details including names, contact information and Oyster card refund data including bank details were accessed.