BA280 from LAX boarding shortly, looks like we may just nick over the 4h delay time... [ edit ] we wasted time walking all the way back to the gate, only to be told the flight plan still isn't finalised, only then can they refuel, and only then can they board. Probably a solid hour to pushback, so if Paul21 is right, the crew are then out of hours and we are relying on them agreeing to an irrops exception.