Network Rail told ITV News that there is no gas leak at London Bridge station and that train services are running as normal.
They added that four people were taken ill but the incidents were not related to each other.
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Brent Stirton won the Wildlife Photographer of Year award for his image Memorial to a Species, taken at a game reserve in South Africa.
Analysis of queues found drivers faced 1.35 million traffic jams, costing them in wasted time, fuel and unnecessary carbon emissions.
It will be a cloudy day across much of Wales, central and southern England with outbreaks of rain and drizzle.