Sorry if the tone of this is unsympathetic - all my sympathy has evaporated in this case, I'm afraid.
My DF is 50-odd, has long-term alcohol issues (falls, frailty, memory problems) and after lengthy periods of absence, his employer found that he couldn't cope with his manual job anymore. He was given a more suitable role with reasonable adjustments but the absence continued, and then offered another role again which he turned down. Now the 'final' hearing is looming.
He doesn't seem to understand any of this and just says "I don't know, I don't get it" to everything I ask, which is trying my patience. I have gathered though that voluntary redundancy has been suggested as an option. Is that likely his best bet, at this point? I can't imagine him continuing to work, in fact I'm amazed he has lasted this long.