I have a split AC/UA itinerary coming up, departing Thursday and travelling with my SO who is AC throughout (our returns to LHR are different). We both booked through Expedia, because both itineraries are complex.

With the threatened strike, as I understand it, we need to speak to Expedia, at least before the initial flight. This seems to me to be a very great disadvantage as they are going to be last in the line for rebooking.