On BA's website all you need is booking reference and last name.

Seat can be changed, order special meal...etc

My baggage tag show Class: F when I fly J class from HKG-KHH and my bag was the first to arrived when I fly KA432 few days ago......

However, I think those First Class red tag is useless at new system. I always fly intra-Asia J class. Before the new system, I remember 6-7/10 times my bag is the first arrive with all red tag. But since the new system, I flown more than 15 times with CX/KA, if the flight has no First Class cabin, my baggage tag will print Class: J, and my bags will usually come out between some blue or red tags.

What I do is, just slapped the priority tag in the front of my luggage case.

http://scontent-a.cdninstagram.com/h...98603264_n.jpg

Granted, I'm a DM though. So I'm not really cheating the system. An agent at FRA even joked once, if only more pax would do this. It would be a lot more environmentally friendly!