A gain or loss accruing to an individual on a qualifying disposal of any ordinary shares in a company which—
shall not be a chargeable gain or, as the case may be, an allowable loss.
For the purposes of this section a disposal of shares is a qualifying disposal in so far as—
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
In determining for the purposes of this section whether a disposal by any person of shares in a venture capital trust relates to shares acquired in excess of the permitted maximum for any year of assessment, it shall be assumed (subject to subsection (5) below)—
It shall be assumed for the purposes of subsection (1) above that a person who disposes of shares in a venture capital trust disposes of shares acquired at a time when it was not such a trust before he disposes of any other shares in that trust.
References in this section to shares in a venture capital trust acquired in excess of the permitted maximum for any year of assessment shall be construed as references to shares not acquired within the limit in section 709(4) of ITTOIA 2005; and the question whether shares are acquired within that limit shall be determined as it is for the purposes of Chapter 5 of Part 6 of that Act.
In this section and section 151B "ordinary shares", in relation to a company, means any shares forming part of the company's ordinary share capital (within the meaning given in section 989 of ITA 2007).