- A barrister when conducting proceedings in Court:
(a) is personally responsible for the conduct and presentation of his case and must exercise personal judgement upon the substance and purpose of statements made and questions asked;
(b) must not unless invited to do so by the Court or when appearing before a tribunal where it is his duty to do so assert a personal opinion of the facts or the law;
(c) must ensure that the Court is informed of all relevant decisions and legislative provisions of which he is aware whether the effect is favourable or unfavourable towards the contention for which he argues;
(d) must bring any procedural irregularity to the attention of the Court during the hearing and not reserve such matter to be raised on appeal;
(e) must not adduce evidence obtained otherwise than from or through the client or devise facts which will assist in advancing the lay client's case;
(f) must not make a submission which he does not consider to be properly arguable;
(g) must not make statements or ask questions which are merely scandalous or intended or calculated only to vilify insult or annoy either a witness or some other person;
(h) must if possible avoid the naming in open Court of third parties whose character would thereby be impugned;
(i) must not by assertion in a speech impugn a witness whom he has had an opportunity to cross-examine unless in cross-examination he has given the witness an opportunity to answer the allegation;
(j) must not suggest that a victim, witness or other person is guilty of crime, fraud or misconduct or make any defamatory aspersion on the conduct of any other person or attribute to another person the crime or conduct of which his lay client is accused unless such allegations go to a matter in issue (including the credibility of the witness) which is material to the lay client's case and appear to him to be supported by reasonable grounds.
[Code of Conduct, Bar of England and Wales]