EXHIBIT 5.3 [letterhead of Maples and Calder] 1st May, 1998 To: Yorkshire Power Finance Limited PO Box 309 George Town Grand Cayman Cayman Islands British West Indies Dear Sirs: RE: REGISTRATION STATEMENT ON FORM S-1 - --- ---------------------------------- We are Cayman Islands Counsel to Yorkshire Power Finance Limited ("Yorkshire Finance") in connection with the preparation of a registration statement on Form S-1, including a preliminary prospectus, filed with the United States Securities and Exchange Commission (the "Commission") on 13th March, 1998 (the "Registration Statement"), contemplating the registration under the United States Securities Act of 1933, as amended (the "Securities Act"), of Junior Subordinated Deferrable Interest Debentures (the "Junior Subordinated Debentures") to be issued by Yorkshire Finance and guaranteed by Yorkshire Power Group Limited ("Yorkshire"). The Junior Subordinated Debentures will be issued pursuant to a subordinated indenture, as supplemented, to be entered into between Yorkshire Finance, Yorkshire and the trustee named therein (the "Subordinated Indenture") in substantially the form filed as an exhibit to the Registration Statement. For the purposes of this opinion, we have reviewed the Companies Law (1995 Revision) of the Cayman Islands (the "Companies Law") and have examined and relied upon: 1. the prospectus relating to the Junior Subordinated Debentures in the form included in the Registration Statement; 2. the Memorandum and Articles of Association of Yorkshire Finance; 3. Certificate of Incorporation of Yorkshire Finance; 4. the form of the Subordinated Indenture; 5. the Minutes of a Meeting of the Board of Directors of Yorkshire Finance held on 11th February, 1998 (the "Minutes"), the Power of Attorney granted by the Company on 11th February, 1998 and the corporate records of Yorkshire Finance; and 2 To: Yorkshire Power Finance Limited 1st May 1998 Re: Registration Statement - -------------------------------------------------------------------------------- 6. a Certificate from a Director of Yorkshire Finance in the form annexed hereto (the "Director's Certificate"). The following opinion is given only as to circumstances existing on the date hereof and known to us and as to the laws of the Cayman Islands as the same are in force at the date hereof. In giving this opinion, we have relied upon the accuracy of the Director's Certificate without further verification and have relied upon the following assumptions, which we have not independently verified:- (a) The Junior Subordinated Debentures and the Subordinated Indenture will be duly authorised, executed and delivered by or on behalf of all relevant parties (other than Yorkshire Finance) and will be legal, valid, binding and enforceable against all relevant parties in accordance with their respective terms under the laws of the State of New York and all other relevant laws (other than the laws of the Cayman Islands); (b) The choice of the laws of the State of New York as the governing law of the Junior Subordinated Debentures and the Subordinated Indenture will be made in good faith and would be regarded as a valid and binding selection which will be upheld by the courts of the State of New York as a matter of New York law and all other relevant courts (other than the courts of the Cayman Islands); (c) Copy documents or the forms of documents provided to us are true copies of, or in the final forms of, the originals; (d) The genuineness of all signatures; (e) The power, authority and legal right of all parties under all relevant laws and regulations (other than Yorkshire Finance under the laws of the Cayman Islands) to execute and perform their respective obligations under the Junior Subordinated Debentures and the Subordinated Indenture; (f) The Junior Subordinated Debentures will be duly completed, executed and authenticated and delivered in accordance with, and as contemplated by, the provisions of the Subordinated Indenture; (g) That all preconditions to the obligations of the parties to the Junior Subordinated Debentures and the Subordinated Indenture have been or will be satisfied or duly waived and there has been no breach of the terms of the Junior Subordinated Debentures or the Subordinated Indenture; and 3 To: Yorkshire Power Finance Limited 1st May 1998 Re: Registration Statement - -------------------------------------------------------------------------------- (h) There is nothing under any law (other than the laws of the Cayman Islands) which would or might affect the opinions hereinafter appearing. Specifically, we have made no independent investigation of the laws of the State of New York. We render no opinion as to the negotiability or transferability by delivery of any Junior Subordinated Debentures in any jurisdiction which does not recognise such negotiability or transferability. Based upon and subject to the foregoing and having regard to such legal considerations as we deem relevant, we are of the opinion that:- 1. Yorkshire Finance has been duly incorporated and is validly existing under the laws of the Cayman Islands; 2. Assuming that the precise terms of issue of the Junior Subordinated Debentures are duly determined by an Attorney of the Company in accordance with the resolutions set forth in the Minutes, the Subordinated Debentures have been duly authorised by Yorkshire Finance and, when executed on behalf of Yorkshire Finance, authenticated in the manner set forth in the Junior Subordinated Indenture and delivered against due payment therefor, will constitute the legal, valid and binding obligations of Yorkshire Finance enforceable in accordance with their terms, except and insofar as such enforcement may be limited as hereinafter set forth. The term "enforceable" as used above means the obligations assumed by Yorkshire Finance under the Junior Subordinated Debentures are of a type which the Courts of the Cayman Islands enforce. It does not mean those obligations will necessarily be enforced in all circumstances in accordance with their terms and we would draw to your attention: (i) enforcement may be limited by bankruptcy, insolvency, liquidation, reorganization and other laws of general application relating to or affecting the rights of creditors; (ii) enforcement may be limited by general principles of equity - for example, equitable remedies such as specific performance may not be available, inter alia, where damages are considered to be an adequate remedy; (iii) claims may become barred under the statutes of limitation or may be or become subject to defences of set-off or counterclaim; (iv) where obligations are to be performed in a jurisdiction outside the Cayman Islands, they may not be enforceable in the Cayman Islands to the extent that performance would be illegal under the laws of that jurisdiction; (v) in the event of any proceedings being brought in the Cayman Islands courts in respect of a monetary obligation expressed to be payable in a currency other than Cayman 4 To: Yorkshire Power Finance Limited 1st May 1998 Re: Registration Statement - -------------------------------------------------------------------------------- Islands dollars, a Cayman Islands court will give judgement expressed as an order to pay such other currency on enforcement of the judgement. With respect to winding up proceedings, Cayman Islands law will require that all claims or debts are converted into Yorkshire Finance's functional currency of account; (vi) Cayman Islands stamp duty will be payable if any of the Junior Subordinated Debentures or the Subordinated Indenture is brought to or executed in the Cayman Islands, which duty would be up to CI$250 on each of the Junior Subordinated Debentures (unless Yorkshire Finance has paid a duty of CI$500 in respect of the issue of the Junior Subordinated Debentures) and would be CI$40 on the Subordinated Indenture; (vii) a certificate, determination, calculation or designation of any party to the foregoing documents as to any matter provided therein might be held by a Cayman Islands court not to be conclusive, final and binding if, for example, it could be shown to have an unreasonable or arbitrary basis or in the event of manifest error; (viii) although there is no statutory enforcement in the Cayman Islands of judgments obtained in New York, the courts of the Cayman Islands will recognise and enforce a foreign judgment of a court of competent jurisdiction without reexamination or relitigation of the matter adjudicated upon, based on the principle that a judgment of a competent foreign court imposes upon the judgment debtor an obligation to pay the sum for which judgment has been given, and provided such judgment is final, for a liquidated sum not in respect of taxes or a fine or penalty, and which was not obtained in a manner, and is not of a kind the enforcement of which is, contrary to the public policy of the Cayman Islands; a Cayman Islands court may stay proceedings if concurrent proceedings are being brought elsewhere; (ix) obligations to make payments that may be regarded as penalties will not be enforceable to the extent that they are penal; (x) in principle a Cayman Islands court will award costs and disbursements in litigation in accordance with contractual provisions in this regard but the applicable rule of court (GCR Order 62, rule 2) has been in force only since 1st June, 1995 and there remains some uncertainty as to the way in which it will be applicable in practice. Whilst it is clear that costs incurred prior to judgement can be recovered in accordance with the contract, it is likely that post-judgment costs will be recoverable, if at all, in accordance with the scales laid down in the Grand Court (Taxation of Costs) Rules 1995; (xi) we reserve our opinion as to the extent to which a Cayman Islands court would, in the event of any relevant illegality, sever the offending provisions and enforce the remainder of the transaction of which such provisions form a part, notwithstanding any express provisions in this regard; 5 To: Yorkshire Power Finance Limited 1st May 1998 Re: Registration Statement - -------------------------------------------------------------------------------- (xii) to maintain Yorkshire Finance in good standing under the laws of the Cayman Islands, annual filing fees must be paid and Returns made to the Registrar of Companies; (xiii) the obligations of Yorkshire Finance under the Junior Subordinated Debentures or the Subordinated Indenture which involve the government of any country which is currently the subject of United Nations sanctions as extended to the Cayman Islands by an Order in Council (namely Iraq and Libya and each an "Affected Country"), any person or body resident in, incorporated in or constituted under the laws of any Affected Country or exercising public functions in any Affected Country or any person or body controlled by any of the foregoing or by any person acting on behalf of any of the foregoing may be subject to restrictions pursuant to such sanctions as implemented under the laws of the Cayman Islands; (xiv) if Yorkshire Finance obtains a beneficial interest in any of the Junior Subordinated Debentures then its rights and obligations in respect thereof may merge thus extinguishing its rights and obligations in respect thereof, so that any attempted resale of those Junior Subordinated Debentures might constitute a separate issue of debt obligations; (xvi) we make no comment with regard to the references to foreign statutes in the Junior Subordinated Debentures or the Subordinated Indenture. This opinion is solely for the benefit of the addressee but may be relied upon by the addressee's legal advisors (in that capacity only). It may not be relied upon by (nor may it be disclosed to) any other person, without the prior written consent of this firm. However, we do hereby consent to the filing of this opinion as an exhibit to the Registration Statement and to the reference to us under the heading "Legal Opinions" in the prospectus included in the Registration Statement. In giving such consent, we do not thereby admit that we are in the category of persons whose consent is required under Section 7 of the Securities Act or the rules or regulations of the Commission thereunder. Yours faithfully /s/ Maples and Calder