A worker has suffered serious burns after reportedly cutting through live cables in London Bridge.
“We were called at 13:16 to London Bridge Street to reports of an incident," a London Ambulance statement said.
“We sent an ambulance crew, motorcycle responder, two single responders in cars and our Hazardous Area Response Team.
“We treated one patient - a man - for serious burns and he was taken to Chelsea and Westminster hospital as a priority.”
Developers behind the renovation of London Bridge station claim the extensive work will result in a "bigger and brighter station" which will transform north-south travel through London.
The work, due to be completed in 2018, will enable trains to run with "Tube-like frequency" every two to three minutes, Network Rail claims.
Passengers will be able to travel more efficiently and make easier connections to other rail services as a result of the improved facilities.
When complete, the station will be longer than the Shard is tall while the entire length of the platforms will be covered by undulating canopies of steel and aluminum.
Dave Ward, Network Rail route managing director, said: “This huge investment in rebuilding London Bridge station will transform rail travel in London for millions of people across London and the south east.
"By 2018, London Bridge will be the most modern station in Britain with more space, better connections and great facilities."
The first phase of the extensive redevelopment of London Bridge railway station is on course to finish next week but passengers have been warned to expect further disruption as renovations continue.
Two new platforms will be brought into use on March 31 before another two are closed for the next stage of the process.
The station is being redeveloped as part of the Government-sponsored £6.5 billion Thameslink Programme which developers claim will remove bottlenecks to enable a more efficient service and to reduce the pressure on the Underground.
The continued overhaul of the station, which began in May 2013, will result in disruption to passengers in late March, August and December.
A man threatening to throw himself into the Thames inadvertently saved the life of a stranger who was drowning in the river below.
Tower RNLI crew say they would never have spotted a person in the water if it wasn't for the callout to reports of someone on a ledge and ready to jump at London Bridge late on Wednesday evening.
By the time they arrived police had managed to talk the man down, but the crew spotted someone else on the bridge pointing towards the water.
It was then that they spotted the person in the river, desperately struggling to keep his head above the water as he was dragged down by a large duffel coat.
When they pulled him out, the crew found he was suffering from hypothermia and he was taken to hospital.
The RNLI say they don't know how the person ended up in the water, but he was said to have been alert and apologetic when he was attended to by crews.
A 13-year-old boy has been attacked on a train during a row about tomato ketchup. Police say the victim was grabbed around the throat and punched in the face between London Bridge to Bexleyheath. The argument was sparked after some sauce ended up being spilled onto a train seat.
- Police are hunting for a white man in his 40s, with receding black hair, a distinctive walk
- He is around 5ft 7ins tall and was wearing a grey coloured suit, a tie and a knee length black overcoat
- The attack happened around 6.40pm on Wednesday, 19 February
Anyone with information can contact British Transport Police on 0800 40 50 40.
Twitter users have posted photographs of the ongoing delays after signal problems at London Bridge this evening.
Nicolas Chinardet posted: "Elephant and Castle train station is packed south bound due to the problems in London Bridge"
Andra Sonea said:_ "It took me 3h to get home from London Bridge. Oh the joy of commuting"_
Commuters have posted their frustration on Twitter after signal failures led to severe disruption at London Bridge. Although all lines are now back open, Network Rail warns of ongoing major delays.