No I'm not, that is the legal position. At this point in time he doesnt have the shares to be taken away, the shares are in a trust which he may receive in the future. Hence being a beneficiary.....the "potential" part comes in because it is at the trustees discretion to distribute them to him. In all likelihood he will be distributed the shares at a point in time. But he is not in legal possession of them now. Nobody knows who the trustees of the trusts are, if he is one as well as being a beneficiary then fine. However that isnt clear.
I've done quite a bit of work with discretionary trusts over the last two decades. You can believe me or not, but what I am saying is accurate.