I don’t think you have much choice in that instance, the only way to publicly see it is after probate. Otherwise it is up to the executor to share it, which they seem to do regularly with public bodies and companies but rarely relations who may or may not be mentioned in the will. Even if you ask the solicitor, they may want permission of the executor to progress. It is very unsatisfactory for a relative or close contact who may think they are mentioned but will never know.