Originally Posted by
rich0110
LHR-PEK in T (WT+)
PVG- LHR in T (WT+)
You should be able to upgrade these, assuming it is issued on a BA ticket. If it is made through a travel agent then the booking cannot have other carriers on it.
Check for CW award availability, if there is you may need to call to process the upgrade.
See the links within the thread I linked above for more info.