49.1  Termination Sum

The Authority shall pay to the Contractor the Termination Sum together with as applicable:

(a)  any interest on any Base Senior Debt Termination Amount and the Lender RV Element and any Contractor's Residual Value Overage Share (where due) or the EUV-SH of the Leases element of the Termination Sum at the Senior Debt Rate; or

(b)  any interest on any Revised Senior Debt Termination Amount and the Lender RV Element and any Contractor's Residual Value Overage Share (where due) or the EUV-SH of the Leases element of the Termination Sum at the Senior Debt Rate,

on or before the date falling forty (40) Business Days after the Notice Date provided that it may elect to pay the Adjusted Estimated Fair Value of the Contract or the Base Senior Debt Termination Amount or the Revised Senior Debt Termination Amount or the Lender RV Element (as relevant) element of the Termination Sum in accordance with clause 49.2 (Instalments) below.