article_snippet.sent: London commuters faced traffic chaos this morning while thousands are still without power as firefighters battle to extinguish an underground blaze that has been raging for more than 24 hours.
article_snippet.sent: Commuters were urged to avoid travelling through Holborn if possible, and firefighters were unable to estimate when the situation might return to normal.
article_snippet.sent: Transport for London said that 15 bus routes were being diverted, and witnesses described seeing dozens of buses backed up along High Holborn, but Underground services have returned to normal.
highlights_snippet.sent: Commuters have been warned to avoid the area as witnesses describe long queues of buses .