In this case, petitioners seek the disqualification of the law firm of AlvaradoSmith which previously represented another law firm in an attorney fee dispute and, in this case, represents an expert seeking consulting fees arising out of the same underlying litigation as the attorney fee dispute. Petition for writ relief is granted directing the court to enter a new order disqualifying AlvaradoSmith from its representation of plaintiff Reddy, where AlvardoSmith's wide-ranging access to privileged information in the first representation and the substantial relationship between the two matters requires their disqualification.