“Seventhly, a lender cannot claim subrogation if he obtains all the security which he bargained for, as in Burston Finance (applying Capital Finance Co Limited v. Stokes[1969] 1 Ch 261 ) or where he has specifically bargained on the basis that he would receive no such security as in Paul v. Speirway Limited (in liquidation)[1976] 1 WLR 220 . Eighthly, the fact that the lender’s failure to obtain the security he bargained for was attributable to his negligence is irrelevant. It does not prevent him from claiming subrogation- see per Lord Hoffmann at 235G in Banque Financière. The effect of that observation was probably impliedly to disapprove observations of Walton J in Burston Finance at 1657C and F. However, Walton J was concerned with a case where the lender obtained the security, but negligently failed to protect himself by registering it, whereas in Banque Financière the lender’s negligence was in failing to check that he had obtained the security… Eleventhly, it is difficult, and may be impossible, for a lender who has obtained security to invoke subrogation where the security he has obtained gives him all the rights and remedies of security to which he claims to be subrogated (see Burston Finance at 1653 D-E), or is a security on which the original security would naturally merge (see Burston Finance at 1653C and per Lord Diplock in Orakpo [v. Manson InvestmentsLimited[1978] AC 95 ] at 105B-C.”