London travel news LIVE: Overground, Southern and Thameslink rush-hour chaos looming after railway track fire

Network Rail has warned the fire has damaged cables that supply electricity to the railway, causing heavy disruption to trains between London Bridge and Crystal Palace.

London Overground services are only running between New Cross Gate and Highbury & Islington.

Meanwhile Southern and Thameslink services running through the area may be cancelled or diverted to and from London Victoria.

Heavy disruption is expected until the end of the day.

Elsewhere a casualty on the track between Swindon and Didcot Parkway on Tuesday morning closed some lines between Paddington and the South West of England and Wales.

The incident created 90 minute delays on Great Western Railway services between the London station and cities such as Cardiff, Bristol and Plymouth.