a knowledge of the working of a solicitor's office, particularly er o of those departments handling non-contentious business, cannot be automatically imputed to the judge or to council  and he may as well make  it is not uncommon for an expert witness to give evidence of what he would have done in a particular situation after consideration and er i resign on that because in my submission er the issues in this case are clearly issues of mixed fact and law and my lord it is seen from the report handed up that there is particularly in relation to the erm financial aspect of the  case, reference to a provision within a  professional conduct of solicitors guide as to what the nature of the er duties of the solicitor in the situation is.