2The aggregate amount prescribed under section one of this Act for any year shall be reduced by—
(a)one-half of the expenditure incurred in that year under section twenty-three of the Fire Services Act, 1947, on the central training institution;
(b)three-quarters of the expenditure so incurred on local training centres ;
(c)such proportion not exceeding one-half as the Secretary of State may with the consent of the Treasury determine of the expenditure incurred by the Secretary of State in that year under sections forty-five and forty-six of the Children Act, 1948.