See: (i) Hamzeb Milas and Sons vs British Lmex Industries Ltd. , (ii) R.D. Harbottle (Mercantile) Ltd. and another vs National West Minister Bank Ltd. ; (iii) Edward Owen Engineering Ltd. vs Barclays Bank International Ltd., [1978] l All E.R. 976 and (iv) UCM (Investment) vs Royal Bank of India, The last case is of the House of Lords where Lord Diplock in his speech said (at p. 725): "The whole commercial purpose for which the system of confirmed irrevocable documentary credits has been developed in international trade is to give to the seller an assured right to be paid before he parts with control of the goods and that does not permit of the any dispute with the buyer as to the performance of the contract of sale being used as a ground for non payment or reduction or deferment of payment.