8(1)This paragraph applies where—
(a)an amount is payable under section 111 or this Schedule by the transferee company,
(b)a notice of determination of the amount payable has been issued by the Commissioners, and
(c)the whole or part of that amount is unpaid six months after the date on which it became payable.
(2)The following persons may, by notice under paragraph 9, be required to pay the unpaid amount—
(a)the transferor company;
(b)any company that, at any relevant time, was a member of the same group as the transferee company and was above it in the group structure;
(c)any person who at any relevant time was a controlling director of the transferee company or of a company having control of the transferee company.
(3)For the purposes of this paragraph—
(a)a “relevant time” means any time between the execution of the relevant instrument and the transferee company ceasing to be a member of the same group as the transferor company;
(b)a company is “above” another company in a group structure if it is the parent (within the meaning of the relevant group relief provision)—
(i)of that company, or
(ii)of another company that is above that company in the group structure.
(4)In this paragraph—
“director”, in relation to a company, has the meaning given by section 168(8) of the Taxes Act 1988 (read with subsection (9) of that section) and includes any person falling within section 417(5) of that Act (read with subsection (6) of that section); and
“controlling director”, in relation to a company, means a director of the company who has control of it (construing control in accordance with section 416 of the Taxes Act 1988).