Trial practice also is dramatically different in Britain. The parties' solicitors do not go into court. Courtroom work is done by different lawyers, called barristers. The barristers are not permitted to interview any witnesses before trial. They know the substance of what each witness intends to say, but do not rehearse questions and answers, as in the United States. Which approach do you consider more effective? More ethical? What is the purpose of a trial? Of pretrial preparation?