London Fire Brigade is reassuring Londoners that it will be responding to 999 calls throughout the four hour strike today.
The Brigade has plans in place to provide a contingency level of emergency cover across the capital during the walkout.
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More than a tenth of the Piccadilly Line train fleet is out of action because of emergency repairs to damaged wheels.
Rows of students stood and turned their backs before filing out of the lecture theatre.
Effie the endangered Western lowland gorilla has given birth to a healthy baby boy at London Zoo.