54For section 327 substitute—
(1)Reductions are to be made in accordance with this section in a post-commencement period if the relevant amount for the period (see subsection (4)) is not nil.
(2)If the company has a non-qualifying pool, the amount in the non-qualifying pool is to be reduced (but not below nil) by setting against it a sum equal to the relevant amount for the post-commencement period.
(3)If—
(a)any of that sum remains after being so set against the amount in the non-qualifying pool, or
(b)the company does not have a non-qualifying pool,
the amount in the ring fence pool is to be reduced (but not below nil) by setting against it so much of that sum as so remains or (as the case may be) a sum equal to the relevant amount for the post-commencement period.
(4)For the purposes of this section, the relevant amount for a post-commencement period is the sum of—
(a)the amount of any relief given in respect of ring fence losses in the post-commencement period under sections 45, 45B, 303B, 303C and 303D, and
(b)the amount of any relief prevented from being given in respect of ring fence losses in the post-commencement period by claims made under sections 45(4A) and 45B(5).”