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No doubt there are a few red faces at American news channel CNN today after one geographically challenged employee failed to locate London on their map.

It may be one of the world’s biggest capital cities, but the graphic instead pointed to Norfolk, in East Anglia, about 120 miles from the capital.

The image was meant to show viewers where the recent phone hacking arrests had taken place.

The humorous but embarrassing blunder, shown on the leading US news channel on Sunday, was flagged up by scores of Twitter users on Sunday evening after a viewer spotted the mistake and put it up on the social networking site.

One Twitter user said he was waiting to see the coach loads of American tourists trying to find Buckingham Palace in the rural backwaters of Norfolk.