Baggage Allowance if First Class not first leg
I am looking at an upcoming flight where the connecting leg has a confirmed (SWU) upgrade but the initial leg is still in coach.
Will I be able to check bags when I leave as if I was first class, or do they only look at the initial leg?
Sending the kid off to school, so I'm checking as many bags as I can.
There is nothing I can find in the baggage rules about this.