The bulk of the work on the totally rebuilt London Bridge station is
now complete, though work on the all-important retail units continues,
both in the arcade that connects the station concourse and the Tube
station, and under the brick viaduct to the west of the station. The
Thameslink platforms and track are complete, but TL trains are not yet
serving the station, so their platforms are not currently in use.

The spacious, all-new station reopened on Tuesday the 2nd, and I went
along the next day to take some pictures:
https://www.flickr.com/photos/recliner/sets/72157690250491781

This was the first mainline railway terminus in London, but not a
trace of the original stations remain, as it has been rebuilt from the
ground up. It is now airy, spacious and vast, but as with many new
stations, has few seats.