In message
,
Tristán White writes

Anyone know whether, when Abbey Wood becomes the terminus of
Crossrail, it will close down for any considerable length of time for
rebuilding work between now and 2018, and if so when (ie when is that
whole station going to be rebuilt?)

There may be a better source than this:
http://democracy.bexley.gov.uk/mgAi.aspx?ID=7397

But it indicates that the LB of Bexley has been informed that Abbey Wood
will now stay open during the rebuild (which is due to start in 2013,
and which will take longer than the original proposal to close the
station during construction).
--
Paul Terry