You are absolutely right that it's unfair to the other beneficiaries,
but only because the litigation system in this country is unfair. It's
absolutely normal that the successful litigant is out of pocket for
costs. The executor only received fixed costs of around 20% of what was
incurred. That's a shame, but it's how the system works.
It's NOT okay to deduct money from one beneficiary's share simply on
general grounds of fairness. There's no power for executors to do that.
> Do you suggest the executor
> should sue the beneficiary instead?
He did sue the beneficiary, but the costs available in the small claims
track are very limited.
> Offsetting the costs in this way
> seems reasonable and I would expect the court to support it.
The courts apply the law, and there's no law allowing this.
In fact, if the OP goes ahead and makes the deduction, he well might be
guilty of theft. Ironically, had he made the deduction without
consulting a legal newsgroup, he would not have had the mens rea for
theft. However, he has now asked, and (apart from you) the view has been
that it's illegal to deduct more than ordered by the court. So, if he
now goes ahead, he would have mens rea.