I would ask, did HR not hold any face to face meetings?
I understood that they had a five minute meeting with managers or should have if it could gone ahead.
Its obviously very painful to lose so much and one can only try and understand the pain that many are having right at this moment. I cannot express my sincere thoughts to all of our colleagues who are facing redundancy or similar. You guys and gals are not alone and all aviation people I am sure, offer their thoughts at this time.
i wouldn't castigate line management for such a letter as it's a legal obligation.
Our thoughts are with all in these difficult times.