Passengers at London Bridge station have reported being evacuated by armed police. According to the Met Police, officers were called after reports of a man on a train making threats.
Network Rail have released a video showing track laying at London Bridge last week. Two new platforms have opened at the station this morning.
First Capital Connect says trains between London Bridge and East Croydon are being delayed by up to 20 minutes because of an earlier problem at London Victoria.
An incident which left a man with serious burns will be investigated by the Health and Safety Executive.
A police statement said:
Fire crews are present in London Bridge after a man suffered serous burns during an work incident.
A hazard zone is in place after a workman suffered serious burns in an incident in London Bridge, the fire service has said.