Two teenagers accused of hacking Transport for London (TfL) systems have pleaded not guilty to computer hacking charges at Southwark Crown Court.

Thalha Jubair, 19, from East London, and Owen Flowers, 18, from Walsall in the West Midlands, spoke only to confirm their names and enter their pleas during a brief hearing.

Both are charged with conspiring to commit unauthorised acts against TfL under the Computer Misuse Act. In addition, Mr Flowers is accused of attempting to hack computer systems belonging to California-based Sutter Health and another US company, SSM Healthcare Corporation.

Mr Jubair has also been charged with failing to provide passwords for his devices.

TfL said the hack caused £39m of damage and disrupted services for three months during the autumn of 2024. While transport itself was unaffected, many TfL online services and information boards went offline as part of the attack.

The company was forced to contact thousands of customers to inform them that there may have been unauthorised access to personal information such as bank account numbers and sort codes. Data including names, emails, and home addresses were accessed.

Judge Christopher Hehir set a trial date for 8 June next year, with proceedings expected to last between four and six weeks. Both men remain in custody on remand.

Image: Transport for London