OK sure. pax should be rebooked... either from BA or QF. there you go 
Interestingly I had friend on a UA sold UA->QF itin a few weeks ago. UA got her to SYD fine, but she had a 90 minute connection to QF SYD-PER. When I saw it red alert sirens went off for me, but nothing I could do about it. Anyway she arrived fine on UA, but held up in customs, and I am actually uncertain if she used the QF transfer or not because she messaged that she did, then claimed they tried to drop her at VA, so that makes zero sense so I think she wound up on the T bus. Anyway while she arrived just prior to boarding of her PER flight (around 30 prior to STD) QF refused her bags but they did rebook her.. for four hours later (despite a flight with Y seats two hours later which aggravated me on her behalf) but they did do it.
Yep not another airline delay but SYD staff are clearly very used to dealing with such things and probably would just do it rather than push it back at BA.. but the point is taken.
