Thousands of Londoners are likely to face severe train delays until the end of the week following "extensive" damage to overhead power cables.
The problems at Radlett in Hertfordshire have affected the services of three train companies in the capital.
Paul Brand has been speaking to Mick Cash from the RMT union and to passengers affected by the delays.
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The twins cubs, which were born in June, have been named Bert and Ernie after characters from Sesame Street.
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