Originally Posted by
moondog
In that scenario, if they really pressed him, he could change his Sh-hk ticket on the spot.
ETA: I'd do the open jaw instead, just for the efficiency of it, though.
All flights are with One World carriers (BA and Cathay) LHR - PVG return is a single booking with BA, PVG - HKG return is planned to be a single booking with Cathay. I'll do as suggested with the open jaw though.