ah you're assuming someone else would take him on for the full £600k, not a chance, certainly not in this market, so if they could at least save £200k per week off the wage bill for someone they don;t want to play then they might go for it.
What type of economics is that?
Spend 20m a year to save 10m
They'd be better off agreeing a pay off of his deal, at a far more reduced number than the above and let him ho on a free.
They could give him a 5-10m pay off which he would I'm sure more likely take
Or sell him to China and dont lose anything