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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Sussex astronaut Tim Peake's space mission will be celebrated with a free exhibition at The Novium Museum in his home city of Chichester.
Emergency rescue teams were at the scene in East Sussex.
Plenty of warm sunshine with the chance of thundery showers later.