Except in the case of a person to whom section 23 of the Act (trade disputes) applies F1or in respect of whom section 20(3) of the Act (conditions of entitlement to income support) has effect as modified by section 23A(b) of the Act (effect of return to work), F2any payment made by a local authority F3in accordance with F4section 17, 23B, 23C or 24A of the Children Act 1989or, as the case may be, section 12, 24 or 26 of the Social Work (Scotland) Act 1968 (local authorities' duty to promote welfare of children and powers to grant financial assistance to persons in, or formerly in, their care).