Save where otherwise specifically provided, where any payment or sum of money due from the Contractor to the Authority or from the Authority to the Contractor under any provision of this Contract is not paid on or before the due date, it shall bear interest thereon at the Prescribed Rate from the due date (whether before or after any judgement) until actual payment and it is agreed between the Parties that the Prescribed Rate and the provisions of this Contract relating to the payment of compensation on termination of this Contract following the occurrence of an Authority Default provide the Contractor with a substantial remedy pursuant to Sections 8 and 9 of the Late Payment of Commercial Debts (Interest) Act 1998.