Some time ago on a Sunday I was out on a Peak District walk with office colleagues including our senior manager. All very light hearted and great camaraderie, the aim for the day. On Monday morning we were all summoned to a series of well separated meetings. 2/3 were told they were to be TUPE'd, the other 1/3 that they were in danger of redundancy, both subject to approprate notice periods.
We had a big party, goodbyes were said, newer entrants were quick into the job market, as were some others with marketable skills who didn't wait for redundancy money. Consequently when it was all called off a week before the advised date I'd say at least 10% left anyway - including our boss who'd been sworn to secrecy when he came on the walk. What a mess!
There's no easy way to arrange a restructuring to comply with financial and employment legislation as well being kind and considerate to employees, suppliers and customers.