"A barrister must not accept any instruction if to do so would cause him to be professionally embarrassed and for this purpose a barrister will be professionally embarrassed: … (d) if the matter is one in which he has reason to believe that he is likely to be a witness"
"A barrister must cease to act and if he is a self-employed barrister must return any instructions: (a) if continuing to act would cause him to be professionally embarrassed within the meaning of paragraph 603 provided that if he would be professionally embarrassed only because it appears to him that he is likely to be a witness on a material question of fact he may retire or withdraw only if he can do so without jeopardising the client's interest."
" 21.12 Solicitor called as Witness A solicitor must not accept instruction to act as advocate for a client if it is clear that he or she or a member of the firm will be called as a witness on behalf of the client, unless the evidence is purely formal. 1. A solicitor must exercise judgment as to whether to cease acting where he or she: (a) has already accepted instructions as advocate and then becomes aware that he or she or a member of the firm will be called as a witness on behalf of the client; or (b) is instructed to act as litigator and knows that he or she must give evidence. 2. The circumstances in which a solicitor should continue to act as advocate, or as a litigator must be extremely rare where it is likely that he or she would be called to give evidence other than that which is purely formal. Factors to be taken into consideration include whether giving the evidence will create a conflict of interest between the solicitor and the client, or whether the solicitor's duty to the court is likely to be impaired. See practice rule 1 p.1. 3. It may be possible for a solicitor to continue to act as an advocate if a member of the firm will be called to give evidence as to events witnessed whilst advising or assisting a client, for example at a police station or an identification parade. In exercising judgment, the solicitor should consider the nature of the evidence to be given, its importance to the case overall and the difficulties faced by the client if the solicitor were to cease to act. The decision should be taken in the interests of justice as a whole and not solely in the interest of the client."
"Sub-Section (1) does not apply to a person (a) wholly in office under the Crown, when acting in that capacity; (b) employed by, or for the purposes of a government department when acting in that capacity; (c) acting under the control of a government department; or (d) otherwise exercising functions on behalf of the Crown."
"A respondent to an appeal, the Secretary of State or the United Kingdom representative may be represented by any person authorised to act on his behalf."
"22. If an Appellant is sufficiently proficient in English to be able to read it as well as speak it it is not credible that she would not have known the English name of her party if she had indeed been a member of it for some two years. Furthermore, given her knowledge (she gave much of her evidence in English and answered questions in English) she would have been aware immediately of any interpreter problems during her interview and if there were I find would have mentioned that at the time."