I don't work at Tfly so this is speculation, however In a previous life I worked at a large (non airline) company that had a number of volantary redundancy / early retirement packages and they were always very oversubscribed by the guys nearing retirement with many years in the pension pot - I suspect this will be the case here!
Also I am reasonably well informed that redundancies can no longer be based on 'last in first out', 'seniority' etc etc. as this would infringe the current employment legislation. I'm no lawyer but that was the view of the last 2 companies I worked for when they came to make redundancies.