ITA 2007 states
257DG(1) The control element of the requirement is that–
(a)the issuing company must not at any time in period A control (whether on its own or together with any person connected with it) any company which is not a qualifying subsidiary of the issuing company, and
Company A, which is controlled by a single shareholder, wishes to raise some investment through SEIS. The same shareholder that controls company A also controls a seperate Company B. Company A does not own any shares in Company B.
The fact that the same shareholder controls both companies does this mean that Company A falls foul of 257DG(1) above. In otherwords can it be argued that Company A could control Company B and therefore fails this test.