Allowing employees to have some degree of freedom when it comes to the internet can help to boost productivity and morale in the workplace, it has been suggested.However, Toby Thompson of the Cranfield School of Management said that employers must be careful to "strike the right balance" and ensure that employees weren't distracted.Companies said to have recently banned employees from accessing social networking sites include British Gas and Credit Suisse."From a staff retention point of view, it is the manager’s responsibility to weigh the workers' talents and company contributions against their off-piste internet use habits. It would be costly to lose a valuable employee to a draconian rule that forbade Facebook access," he commented.According to a recent report by PopGap Games, a ten-minute online break can help to sharpen the mind and improve efficiency.