The situation with regard to the life insurance policy is that once it is written in trust for a 3rd party, it cannot be taken out of that trust until the beneficiary agrees although if he was still paying the premiums, he could simply stop paying them.
What we don’t know is whether the solicitor that dealt with the divorce was aware of this policy because the solicitor would not normally advise on anything which he was not aware of.
It may be that her remaining the beneficiary of the policy was part of any financial deal.
You say that he believed that since he was divorced his ex would not benefit but it depends whether he took advice on that and what he was told because the situation is as I mentioned in the first paragraph of this reply and it could well be quite simply that your late brothers understanding was incorrect.
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