tristar
Seeing as Arizona has not replied yet, I will pass on the situation this side of the pond.
I cannot speak for the 747 Classic, but on the TriStar, BA used to fly with 3 pilots, same as the Trident.
It didn`t seem to cause any trouble & was only changed for routes outside Europe where a Longhaul F/E was carried.
I well remember that Cairo was a Shorthaul Captain & First Officer with a Longhaul F/E & that DID cause problems!!
tristar 500