I am sorry but I find Len’s letter totally unacceptable and pretty childish. Obviously I say that without seeing Alex’s email to Len but the whole thing screams playground school kids rather than professional organisation.
Industrial action at a time where we need to get as many planes in the sky as possible is extremely damaging. Whilst the threat may be there with a view that it will seek some results, going ahead with it may well be one of the final nails in the coffin and will not deliver any empathy from other employees caught in the firing line.
I honestly don’t know that there is a solution to suit all but going on strike is not the answer in my opinion.