You don’t need to include or update people’s addresses in wills, or tell your solicitor every time they move. Otherwise it would be a never ending saga! Just keep an up to date list of addresses, so far as you know them, and phone numbers with your copy of the will to help the executors in due course. Believe me, beneficiaries come out of the woodwork when someone dies despite their protestations of not wanting money. If they decide to be elusive solicitors have ways of tracing them.
If the solicitor is still corresponding with her about her inheritance from her late father you could tell him the situation as a matter of courtesy but it’s up to him to find a way of contacting her, not your problem.
I miss the woman my daughter was before she lost her husband
If you had the chance to be the Roosevelt of our time what jobs would you provide?


