Acas theres a helpline number to call , make sure you have everything in front of you .
There could be a time limit ? It smells of discrimination and failure to make reasonable adjustments.
Constructive dismissal is another path .
Disability discrimination.
If the company in question held Disciplinary meeting’s there should of been the manager someone from HR taking notes/minutes and off course your husband along with someone of his choice to accompany him , if none of this took place then someone’s in trouble.
Everyone has a right .
Good luck there is help
Just going through similar (change of job description) and found this for free advice
Their advice has allowed me to discuss with employer from a position of knowledge of the law.
For instance “your job description is out of date” is countered with “yes, but I’ve been doing the same job for many years - the law doesn’t allow you to just radically change it and expect me to accept the changes - or just walk away”
HTH
The definition of ‘radical changes’ is a can of worms in itself.
At best assuming you win it’s then just a matter of redundancy effectively that still means walk away.
It’s why the terms ‘other reasonable duties as required to meet operational needs’ needs to be questioned and explained specifically and clearly as to exactly what are the other duties.
The law of contract requires offer and acceptance by both parties.
Not asking for and getting a clear breakdown of the exact duties in question severely weakens the bargaining position of the employee regarding any dispute.
It’s actually one of the advantages of agency work.But refusing duties can still in that case mean walk away depending on the position of the agency and client/s.
In this case realistically you’re risking all the costs of losing a contractual duties dispute against an employer v what the redundancy terms are worth at best ‘if’ you win.
Also bearing in mind the usual question why did you leave your previous job when applying for jobs.
Don’t get carried away with the idea of employment litigation.Generally it’s a lose lose situation for the employee.