For the purposes of section 34A(2)(b) of the Act, the amount of tax payable for a heavy vehicle for the financial year commencing 1 July 2017, and for each subsequent financial year, is calculated by adding together –

(a) the road component of motor tax for a heavy vehicle of that type calculated in accordance with the table in Part 1 of Schedule 1; and

(b) the regulatory component of motor tax for a heavy vehicle of that type calculated in accordance with the table in Part 2 of Schedule 1.