I'm almost 100% certain that the solicitor is simply paying the money into the estate which will then be paid out once the estate is settled.
However as Barmaid has pointed out there are special rules which can apply to life policies which I recall can mean they don't always have to go into the estate. I suggest you ask your solicitor about this.
The length of time this has dragged on for does call into question again the wisdom of appointing solicitors as executors for many cases, especially when there is only one beneficiary in the will.