Train services at Liverpool Street station have been suspended while structural engineers inspect a new bridge which has partially collapsed. [...] Around 300 passengers on three trains stopped before entering the station had to walk along tracks to Bethnal Green.Off there to get pictures now.
Update: Couldn't see a thing wrong with it. This eyewitness report says it's the concrete decking that's fallen on the tracks, as does The Telegraph, implying the main structure is safe.
Update 2: Just remembered I had this photo that shows how the deck is supported, taken from a train a couple of weeks ago. Richard J has a clearer picture of the same thing.
Update 3: Construction News has what looks like a full explanation of what happened. The Ipswich Evening Star has a photo of the gaps in the deck.