Performer Beyonce Knowles talks during the nominations news conference for the MTV Video Music Awards in New York, July 31, 2006. Latin pop star Shakira and funk-rock band the Red Hot Chili Peppers led the field with seven nominations for next month's MTV Video Music Awards that will be held August 31 in New York. REUTERS/Brendan McDermid (UNITED STATES)

Beyonce Knowles' new single Check It Out has been blamed for an outbreak of epileptic fits in British television viewers.

The video, which contains a multitude of flashing images, caused a stir after it was aired without an appropriate warning by cable channel Chart Show TV.

After an investigation by broadcasting standards regulator Ofcom, network staff were ordered to undergo retraining to ensure the situation never happens again.

Although the Crazy In Love singer is not responsible for the network's mishap she has told fans she is "sorry" for any distress caused.