London Fire Brigade has confirmed the alarm has been triggered, but there is no sign as yet of any fire.
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Gang members have been jailed over violent fight about money in south east London, Scotland Yard said.
London Underground has been fined £500,000 after a maintenance worker was injured in a fall at a tube station.
He once worked 15-hour shifts at a north London branch of Argos, now Adama Barrow has been declared president-elect in Gambia.