All good answers so far.
What prompted this was a discussion along the lines of....
If you get a cargo shift or all the pax suddenly run to the front/back of the a/c, the initial C of G shift would be handled by the THS. However if this condition persisted would the fuel transfer system attempt to balance the aircraft?
Initially everyone thought no, but after some discussion about the FMGEC and it's 'envelope' protection function. Would this enable a fuel transfer?