'I urge all senior executives to work with the National Cyber Security Centre and take up the Government’s advice and training,' Digital Minister Matt Hancock said. | Leon Neal/Getty Images UK firms unprepared for cyberattacks: survey Charities are also vulnerable.

More than two-thirds of the boards of Britain's 350 biggest companies have not been trained to deal with cyberattacks, according to a British government survey published Monday.

The survey also found 10 percent of FTSE 350 companies don't have a response plan for cyberattacks and more than 40 percent don't have a clear understanding of what impact an attack might have on them.

Charities are just as vulnerable to cyberattacks as companies, according to a second report.

A third report about cybersecurity revealed firms are also struggling to prepare themselves for the General Data Protection Regulation (GDPR), which is to be implemented next year. According to the report, only 13 percent of companies regularly consider the GDPR and just 6 percent are "fully prepared" to meet GDPR requirements.

"These new reports show we have a long way to go until all our organizations are adopting best practice," Digital Secretary Matt Hancock said in a statement.