Workers who spend time on sites such as Facebook could be costing firms over £130m a day, a study has calculated.
According to employment law firm Peninsula, 233 million hours are lost every month as a result of employees "wasting time" on social networking.

The study - based on a survey of 3,500 UK companies - concluded that businesses need to take firm action on the use of social networks at work.

Some firms have already banned employees from accessing Facebook.

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