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A presenter made the blunder during a report on the events unfolding in central London which saw a suspected terrorist reportedly mow down several pedestrians before attacking a police officer.

During the breaking news broadcast this afternoon, the presenters announced that they would be showing an eyewitness account of the attack.

Unfortunately, an irrelevant clip was then broadcast, which was not related to the events taking place in the capital.

Once the broadcaster realised the error, they cut back to the studio where one presenter could be seen making a cut gesture to the camera crew.