“For present purposes the significance of this case lies in the fact that the Court of Appeal accepted that in a case where a solicitor’s negligence in regard to the preparation or execution of a will was the cause of expensive probate proceedings after the testator’s death, this could give rise to a claim for damages against the solicitors at the suit of the testator’s personal representatives for the benefit of the estate generally. On the particular facts of that case, the testator’s personal representatives would have had a good cause of action for the loss suffered and if they had pursued the claim the solicitor would have been exposed to no double liability.”