12.—(1) Where aid is paid under these Regulations by the Countryside Council and, by virtue of Article 20(1) of the Commission Regulation (which provides for recovery of wrongful payments with interest), a reimbursement of all or part of the payment with interest is required, the rate of interest shall be one percentage point above LIBOR on a day to day basis.
(2) For the purpose of this regulation, LIBOR means the sterling three month London interbank offered rate in force during the period specified in Article 20(1) of the Commission Regulation.
(3) In any proceedings relating to this regulation, a certificate of the Countryside Council stating the LIBOR applicable during a period specified in the certificate shall be conclusive evidence of the rate applicable in the specified period if the certificate also states that the Bank of England notified the Countryside Council of that rate.