If the qualifying activity of a person who is entitled to an allowance for a chargeable period is a concern listed in section 12(4) of ITTOIA 2005 or section 39(4) of CTA 2009 (mines, transport undertakings etc) the allowance is to be given effect in calculating the profits of the concern under Chapter 2 of Part 2 of ITTOIA 2005 by treating the allowance as an expense of the concern.