Why would BA have to 'justify' any of their operating procedure to anyone?
Just about sums it up - BA have just aligned
most of their 777 procedures to the Boeing standard, the exceptions being a few items/SOPs they feel they want to retain. The "monitored approach" was one of very few procedures BA decided to keep because they felt it had it's advantages on the triple. Maybe they'll feel differently when they see the 787 in action on the line, maybe not, it's their trainset.
BTW I know it' semantics but the term has definitely been "Monitored Approaches" in BA Longhaul for quite a while now, I believe "Split Approach"
was once a shorthaul term, which probably explains Hobo's comments........