". There followed a number of provisions, of which only the following is material:- "2.That, notwithstanding the terms of the Security Document ... (c)... it is agreed that upon any default by the Borrower to pay any principal, interest or margin owing in respect of the Loan within 10 days of the relevant due date we shall ... automatically apply any monies standing to the credit of the [Deposit] Account ... for the time being in settlement of the same and upon so doing shall to the extent of any monies so applied have no further redress or recourse against the Borrower ..."