British Airways Boeing 747's G-BNLL

I was just reading up about the 747’s that have already been WFU BNLB and LC and noticed LA was due to be WFU Jan 09 but that has’nt happened.

Went onto LHR-LGW and noticed G-BNLL has gone to Cardiff.
Now would that be WFU do you think or C Check?

25th Jan BAW9180 BA9180E GBNLL B744 EGFF 1908 582 27R

Has had no movements for 8 days

Tom