(From the Daily Mail) A number of major firms have banned employees from accessing

Twitter, after it emerged that time wasted on social networking

websites was costing businesses 1.38billion each year.

A survey

published today found that 57 per cent of workers use sites such as

Facebook and Twitter during office hours, spending an average of 40

minutes a week posting messages and sending 'tweets'.

The social networking sites have

already been banned by many large firms and some City banks.

Read more.