British firms are at risk of data leakage through their employees' increasing use of Web 2.0 technologies and social networking websites, security experts have warned.

A survey of more than 1000 office workers found that 42 percent of those aged between 18 and 29 discussed work-related issues on social networking sites and blogs.

More than a quarter of young workers spent three or more hours a week--during their office hours--surfing blogs and websites such as YouTube and MySpace, the research, carried out by polling firm YouGov for content security specialists Clearswift found. Nearly four in 10 admitted accessing such sites "several times a day."

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