If it's redundancy, could be a can of worms. Crown immunity is a thing of the past. Ab initios expect to be chopped if they fail to reach the standard, or to VW if it isn't for them. That is what is expected.
Mixing this with redundancy to a specific pool of employees in training could be an utter fiasco that will line the pockets of employment lawyers and cost more than it saves.
I PVRd in 2004 and am now in civvy employment....most of us have acquainted ourselves with employment law and redundancy procedures. Employers need to follow procedures to the letter, particularly with such a large pool. Scenarios such as reduced hours, part-time working, sabbaticals etc should be considered.
After all, according to the MoD, Service personnel are 'public sector workers'. Redundancy procedures for the public sector are labyrinthine and usually entail generous separation packages. This will be an utter disaster!
If this is the only answer, the question needs to be questioned....