I went along to see how the Crossrail construction was progressing at
Abbey Wood and have uploaded a few pics.

The temporary station (built on the former car park) is in use, with
the old station now being demolished. The third rail tracks through
the station haven't yet been moved, but further west they have been
slewed to the south (visible from the station footbridge), and rails
are already being laid for Crossrail near the Plumstead portal.

In the new station, the third rail tracks and island platform will be
relocated a few metres to the south, with the new Crossrail tracks and
island platform occupying the current alignment. The new station
building will be over the tracks, in place of the old footbridge which
is currently being demolished. You can also see how a couple of
end-terrace houses have been demolished to make room for the relocated
third rail tracks.

Here's a few pics:
https://www.flickr.com/photos/reclin...7650538846330/

I've also included one from platform 4 in London Bridge station,
showing the already rusty former Thameslink tracks and disused
platform 5.