The Child Support (Maintenance Assessments and Special Cases) Regulations 1992

23.  For the purposes of this Part, “the relevant income of a child" does not include—

(a)any earnings of the child in question;

(b)payments by an absent parent [F1to] the child for whom maintenance is being assessed;

(c)where the class of persons who are capable of benefiting from a discretionary trust include the child in question, payments from that trust except in so far as they are made to provide for food, ordinary clothing and footwear, gas, electricity or fuel charges or housing costs; or

(d)any interest payable on arrears of child support maintenance for that child[F2;

(e)the first £10 of any other income of that child]