In article ,
says...

The Concorde used trim tanks. There's a fascinating explanation of it at
http://www.aircraft-info.net/aircraf...iale/concorde/.
Sounds like pumping fuel around to maintain proper CG during different
flight conditions was a full time job.

There's a double DVD from www.itvv.com - over 5 hours of Concorde flight
deck material from the Captain & Flight Engineer. Lots of explanation
of procedures; the 2nd DVD particularly covers a lot of the fuel
management. As an interested non-pilot, I found it fascinating.

T.