Apologies if this has been asked and answered elsewhere on this thread (I've done a bit of speedreading but may have missed it).
As it is the union that has organised the strike, why is it that only some airports are affected?
When the strike was due to start on the 18th, BA was saying that flight from LGW would be unaffected, and that most of the stoppages would be at LHR.
(and a big
for the crew that will still be working throughout the strike period)