Teenage hackers are jailed for their role in a cyberattack on Transport for London (TfL) systems. Multiple reports say the incident led to major disruption and significant costs for TfL, with figures reported around £29 million and, in some accounts, a higher total of £39 million when including additional impacts. The Independent reports that TfL also attributes about £10 million to lost income, bringing the overall estimated cost to £39 million, while other outlets focus on the £29 million figure tied to disruption to services and operational work. Reports also state that the defendants had livestreamed or otherwise publicized aspects of the attack. Sentences reported in coverage of the sentencing hearings include terms of around five and a half years in prison, though exact individual lengths may vary by source. The cases are described as involving young offenders who accessed parts of TfL’s network and caused damage through the intrusion. TfL frames the harm primarily in terms of financial losses and the operational effort required to recover from the attack.