Well-briefed on redundancy.....hah!
I've seen my employer go through multiple tranches and they were less than well-briefed. The only reason they haven't been at a tribunal (yet...and to my knowledge) is that those I have known who have spotted glitches in their own case, or indicated willingness to put up a fight have been 'looked after' in some way or another. Of course, many people just accept it and acquiesce, which is the calculated risk on the employer's part.
RAF is required legally, as an employer, to allow reasonable time off for retraining and jobhunting, for those being made redundant.
For those at risk...start consulting lawyers. Maybe collectively.
This could be very expensive.