(1) Where the operator of an installation fails to pay a civil penalty (the "first penalty") under article 54 on or before the due date set out in the penalty notice imposing the first penalty, the operator is liable to a further civil penalty.

(2) The further civil penalty is -

(a) 10% of the first penalty; and

(b) a daily penalty at a daily rate of £150 for each day that the operator fails to pay the first penalty beginning with the day on which the initial notice is given, up to a maximum of £13,500.