Okay, time to share the info, as I am now allowed. I was told by an informed member of the forum in private that the release clause is of £250M and it only kicks in if his performance standards and numbers in the first three years are below a certain level.
In other words, it is absolutely nothing to be concerned and like said, it will probably be gone in 12 months when a new contract is renegotiated. He isn’t leaving soon. If he eventually leaves, it probably would not be through an activation of release clause.