The UK's elections watchdog says it's taken three years and at least a quarter of a million pounds to fully recover from a hack that saw the private details of 40m voters accessed by Chinese cyber spies.
Last year, the Electoral Commission was publicly reprimanded for a litany of security failures that allowed hacking groups to spy undetected, after breaking into databases and email systems.
In the first interview about the hack, the commission's new boss admits huge mistakes were made, but says the organisation is now secure.
"The whole thing was an enormous shock and basically it's taken us quite a few years to recover from it," says chief executive Vijay Rangarajan.
