1.7.1 You must not act for two or more clients in matters where there is a conflict of interest between the clients or for any client where there is a conflict between the interest of the client and your interest or that of your practice unit.

1.7.2 Even where there is only a potential conflict of interest you must exercise caution. Where the potential for conflict is significant, you must not act for both parties without the full knowledge and express consent of the clients.