Robin Gisby, Network Rail’s managing director of network operations, said: “We’re transforming one of London’s busiest stations.
"While we work, London Bridge will remain open for the thousands of people who use it every day and we are working closely with the train operating companies which serve London Bridge to keep passengers informed.
“Once complete London Bridge will unlock the full benefits of the Thameslink programme and increase capacity through central London.”
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Friday's forecast for the west of the region
Friday's forecast for the east of the region
Extra support is on offer to help local reisdents in Dartford and Thurrock using the Dartford Crossing.