In deciding if there is such a controlling interest, there is no formula applicable to all case~. Relationship and position as Director are not by themselves decisiv_e. If relatives a.ct, not freely, but with others, they cannot be said to belong to that bQdy, which is described as 'public' in the Explanation. But it would be otherwise if they were free. Similarly, if Directors or some of them do not act as a body or in concert with others, the fact that they are Directors is of no significance. The case of Tatem Steam Navigation Go., Ltd. v. Commissioners of In"land Revenue (9 ) illustrates the first proposition. There, the assessing Commissioners had made directions under s. 21 of the Finance Act, 1922, against which the Company appealed on the ground that it was a Company in which the public were substantially interested, inasmuch as shares of the Company carrying not less than 25 per cent. of·the voting power had been allotted unconditionally to or acquired unconditionally by, and were, at the end of the relevant periods, beneficially held by ~he public and the decision of the Special Commissioners that 16,000 shares given by Lord Glanely to his niece were not allotted to. or acquired by the public and that the Company was, therefore, not (I) (1941) 24_T.C. S7·