4 Surcharge
1 Where a person fails to pay the amount required to be paid under the penalty notice in accordance with regulation 2(1), he shall in addition be liable to pay to the responsible authority a further sum (in these regulations referred to as “a surcharge”), calculated in accordance with paragraph (2).
2 The amount of the surcharge shall be 50% of the amount of the penalty charge (rounded down, where necessary, to the nearest whole penny.)