`[38] ... If a solicitor becomes the client's 'man of business', and some solicitors do, responsible for advising the client on all matters of business, including investment policy, finance policy and other business matters, the advice may lack a relevant legal context. There is, in my opinion, no way of avoiding difficulty in deciding in marginal cases whether the seeking of advice from or the giving of advice by lawyers does or does not take place in a relevant legal context so as to attract legal advice privilege. In cases of doubt the judge called upon to make the decision should ask whether the advice relates to the rights, liabilities, obligations or remedies of the client either under private law or under public law. If it does not, then, in my opinion, legal advice privilege would not apply. If it does so relate then, in my opinion, the judge should ask himself whether the communication falls within the policy underlying the justification for legal advice privilege in our law. Is the occasion on which the communication takes place and is the purpose for which it takes place such as to make it reasonable to expect the privilege to apply? The criterion must, in my opinion, be an objective one.'