In message 01cc2c90$fd06dd20$LocalHost@default, at 12:35:38 on Fri, 17
Jun 2011, Michael R N Dolbear remarked:

I looked at the tube map and noticed TCR isn't on the Northern Line
anymore, only on the Central.

That's right. The NL station is closed until "late November 2011" for
Crossrail works.
--
Roland Perry