51(1) Where a person beneficially entitled to an interest in possession in settled property disposes of his interest the disposal–
(a)is not a transfer of value, but
(b)shall be treated for the purposes of this Chapter as the coming to an end of his interest;
and tax shall be charged accordingly under section 52 below.
51(1A) Where the interest disposed of is one to which the person became beneficially entitled on or after 22nd March 2006, subsection (1) above applies in relation to the disposal only if the interest is–