‘In the light of the consistent line taken by the Tribunal as to the weight to be attached to the public interest against disclosure in-built into legal professional privilege (an approach which I have found to be the correct one) it was incumbent upon the Tribunal in the instant case to give significant weight to that interest. Further the Tribunal was obliged to consider whether the weight to be given to the public interest considerations militating against disclosure were countered by considerations of at least an equal weight which supported an order for disclosure’