Transport for London hit by cyber incident

Services unaffected

Transport for London (TfL) has been targeted in an ongoing cyber attack, which has affected the company's computer systems.

In an email, TfL said there is "no evidence" that customer data has been compromised, and there has been "no impact" on services.

The company has "taken immediate action" and is "working closely with the relevant government agencies," it said in a statement.

Those include the National Crime Agency (NCA) and the National Cyber Security Centre (NCSC), according to CTO Shashi Verma.

In his own statement, Verma said, "We have introduced a number of measures to our internal systems to deal with an ongoing cyber security incident.

"The security of our systems and customer data is very important to us and we will continue to assess the situation throughout and after the incident."

Both the NCA and NCSC released their own statements confirming that they are working with TfL to respond to the attack.

Sources at TfL have told the BBC that they have been asked to work at home if possible. They added that the attack has mostly impacted TfL's backroom systems at the corporate headquarters.

Andrew Brown, MD at software developer Propel Tech, said backroom systems being targeted "highlights vulnerabilities that could have had far-reaching consequences... It's clear from the decision to ask employees to work remotely that there is still a lot of work to be done."

Update, 4th September: As spotted by an eagle-eyed Computing reader, and despite TfL's claim that services have not been affected, the Oyster photocard page has been inaccessible since the cyber attack. It is currently down for "maintenance."