SECURITIES PURCHASE AGREEMENT

Exhibit 4

Information in this document marked with “XXX” has been omitted and filed separately with the U.S. Securities and Exchange Commission pursuant to a request for confidential treatment.

EXECUTION VERSION

SECURITIES PURCHASE AGREEMENT

BETWEEN

XXX,

by its manager, GCIC LTD.

AND

BROOKFIELD BRP HOLDINGS (CANADA) INC.

MADE AS OF

OCTOBER 16, 2012

SECURITIES PURCHASE AGREEMENT

THIS AGREEMENT is made as of October 16, 2012

BETWEEN

Brookfield BRP Holdings (Canada) Inc., a corporation incorporated under the laws of the Province of Ontario (the “Purchaser”),

- and -

XXX, an open-ended trust, by its manager GCIC Ltd. (the “Vendor”)

WHEREAS Western Wind Energy Corp. (the “Corporation”) is a corporation duly incorporated, organized and subsisting under the laws of the Province of British Columbia;

AND WHEREAS the Vendor is the legal and beneficial owner of an aggregate of 277,103 common shares in the capital of the Corporation (the “Shares”), all of which shares are listed and posted for trading on the TSX Venture Exchange;

AND WHEREAS the Vendor desires to sell and the Purchaser desires to purchase the Shares, upon and subject to the terms and conditions hereinafter set forth;

NOW THEREFORE, in consideration of the premises and the covenants and agreements herein contained (the receipt and sufficiency of which are hereby acknowledged), the parties agree as follows:

1. Purchase and Sale

The Vendor hereby sells, transfers and assigns and the Purchaser hereby purchases, all of the Vendor’s right, title and interest in and to the Shares free and clear of all Encumbrances (defined below) upon and subject to the terms and conditions hereof.

2. Determination of Purchase Price

The aggregate purchase price (the “Purchase Price”) payable by the Purchaser to the Vendor for the Shares shall be equal to $623,481.75.

3. Payment of Purchase Price

At Closing (defined below),

(a) the Purchaser shall pay to the Vendor, the amount equal to the Purchase Price by wire transfer of immediately available funds in Canadian dollars to the bank account or accounts designated by the Vendor;

(b) the Vendor shall deliver to the Purchaser or its transfer agent the original certificate representing the Shares and to the Corporation an instruction letter in the form

attached as Schedule A hereto instructing the Corporation to reflect the transfer of the Shares in its register and to issue to the Purchaser a new certificate representing the Shares, with such new certificate to be delivered to the Purchaser or an Affiliate (as such term is defined in National Instrument 45-106, Prospectus and Registration Requirements) of the Purchaser as directed by the Purchaser in writing; and

(c) the Vendor shall deliver to the Purchaser a duly executed irrevocable proxy in favour of the Purchaser in the form attached as Schedule B hereto.

The Purchaser acknowledges and agrees that the Vendor’s delivery of the instruction letter and certificate representing the Shares as contemplated by Section 3(b) shall satisfy in full the Vendor’s obligations with respect to the transfer and delivery of the Shares to the Purchaser.

4. Adjustment of Share Purchase Price

(a) If at any time in the twelve-month period following the date of this Agreement any person or group of persons acting jointly or in concert, including, for the avoidance of doubt, the Purchaser, acquires all or substantially all of the assets of the Corporation and its subsidiaries, taken as a whole, or acquires all of the common shares in the capital of the Corporation (the “Common Shares”) (any such transaction being a “Price Protection Transaction”) then, within five business days following completion of the Price Protection Transaction, the Purchaser shall pay, or cause an Affiliate to pay, to the Vendor, the Adjustment Payment (as defined below), if applicable, in immediately available funds.

(b) The “Adjustment Payment” will be equal to:

(i) if the Purchaser or any of its Affiliates or any person acting jointly or in concert with the Purchaser completes a Price Protection Transaction, an additional amount on account of each Share equal to the amount by which the consideration received by the holders of the Common Shares pursuant to the Price Protection Transaction (the “Transaction Consideration”) exceeds $2.25 per Common Share, and

(ii) if any other person or entity completes a Price Protection Transaction, an additional amount on account of each Share that is equal to:

(A) if the Transaction Consideration is less than or equal to $2.75 per Common Share, 85% of the difference between the Transaction Consideration and $2.25 per Common Share, and

(B) if the Transaction Consideration is greater than $2.75 per Common Share, (x) $0.425, plus (y) 50% of the difference between the Transaction Consideration and $2.75 per Common Share.

- 2 -

(c) If all or any portion of the Transaction Consideration is in the form of:

(i) cash, the consideration shall be valued based on the face value of the cash,

(ii) publicly traded securities, the consideration shall be valued based on the closing price of such securities on the date of the completion of the Price Protection Transaction on the published market on which the greatest volume of trading in such securities occurred over the twenty days preceding such date,

(iii) securities that are not publicly traded until the date of the completion of the Price Protection Transaction, the consideration shall be valued based on the closing price of such securities on the five trading days following the completion of the Price Protection Transaction on the published market on which the greatest volume of trading in such securities occurred over such period, or

(iv) any other consideration, the consideration shall be valued at its fair market value as the Vendor and the Purchaser shall mutually agree, acting reasonably.

(d) If all or any portion of the Transaction Consideration has a value expressed in a currency other than Canadian dollars, then the value of that consideration will be expressed in Canadian dollars based upon a conversion rate of exchange equal to the noon spot rate quoted by the Bank of Canada on the date of the completion of the Price Protection Transaction for the purchase of Canadian dollars using the currency in which the consideration (or portion thereof) was originally denominated.

(e) In the event of any disagreement between the parties with respect to the calculation of the Transaction Consideration, the matter will be submitted to an internationally recognized firm of chartered accountants independent of both parties and their Affiliates to be agreed upon by the parties. The decision of such firm of chartered accountants as to the value of the Adjustment Payment will be final and binding.

5. Closing

The sale and purchase of the Shares will be completed immediately after the execution and delivery of this Agreement by the Vendor and the Purchaser at the offices of Torys LLP, 00 Xxxxxxxxxx Xxxxxx Xxxx, Xxxxxxx, Xxxxxxx X0X 0X0 (the “Closing”).

6. Standstill

(a) For a period of twelve months following the date of this Agreement, the Vendor shall not, without the prior written consent of the Purchaser, which consent may be given on such terms and conditions as the Purchaser may determine: (i) in any manner acquire, agree to acquire or make any proposal or offer to acquire, directly or indirectly, any unissued or outstanding securities of the Corporation or propose or offer to enter into, directly or indirectly, any amalgamation, plan of arrangement, merger or business combination involving the Corporation and its Affiliates or to purchase, directly or indirectly, all or substantially all of the assets of the Corporation

- 3 -

and its subsidiaries, taken as a whole; (ii) directly or indirectly “solicit” or participate or join with any person in the “solicitation” of any “proxies” (as such terms are defined in the Securities Act (Ontario)) to vote, or seek to influence any person with respect to the voting of, any voting securities of the Corporation; (iii) otherwise act alone or jointly or in concert with others to seek to control or to influence the management, the board of directors or policies of the Corporation; (iv) solicit, facilitate or encourage any transaction to acquire assets of the Corporation and/or one or more of its subsidiaries representing 20% or more of the consolidated assets or contributing 20% or more of the consolidated revenue of the Corporation and its subsidiaries, taken as a whole, or acquire 20% or more of the Common Shares (an “Acquisition Transaction”) other than a transaction by the Purchaser or any of its Affiliates or any person acting jointly or in concert with the Purchaser; (v) enter into, continue or participate in any discussions or negotiations regarding an Acquisition Transaction, or furnish to any other person any information with respect to the business of the Corporation or its properties, operations, prospects or conditions (financial or otherwise) in connection with an Acquisition Transaction or otherwise cooperate in any way with, or assist or participate in, facilitate or encourage, any effort or attempt of any other person (other than the Purchaser or any of its Affiliates or any person acting jointly or in concert with the Purchaser) to do or seek to do any of the foregoing; or (vi) advise, assist, encourage or act jointly or in concert with any other person in connection with any of the foregoing, other than the Purchaser or any of its Affiliates or any person acting jointly or in concert with the Purchaser.

(b) For greater certainty, and notwithstanding anything else in Section 6(a), Section 6(a) shall not apply to any investment fund or product managed by GCIC Ltd., the manager of the Vendor, (the “Manager”) or any of its affiliates, other than the Vendor, unless such fund or product is managed by XXX, the lead portfolio manager of the Vendor.

7. Vendor’s Representations and Warranties

The Vendor represents and warrants to the Purchaser that:

(a) The Vendor is an open-ended trust established under the laws of the Province of Ontario;

(b) The Vendor is the legal and beneficial owner of the Shares free and clear of all liens, charges, encumbrances, hypothecs, pledges, mortgages, security interests of any nature, adverse claims, options, rights of pre-emption, and any other rights of others (collectively, “Encumbrances”).

(c) Other than the Shares, neither the Vendor nor any of its Affiliates own any shares of the Corporation or any of its subsidiaries or any securities convertible into or exchangeable or exercisable for, or otherwise evidencing a right to acquire, shares of the Corporation or its subsidiaries.

- 4 -

(d) The Vendor has good and sufficient power, authority and right to enter into and deliver this Agreement and to transfer the legal and beneficial title and ownership of the Shares to the Purchaser free and clear of all Encumbrances, subject to compliance with the Securities Act (as defined below) and any other applicable securities Law (as defined below), and, upon payment of the Purchase Price, the Purchaser will acquire good and valid title to the Shares in a manner described in Section 3 hereof, free and clear of all Encumbrances.

(e) Neither the Vendor nor any of its “affiliates” (as defined in Regulation 501 under the United States Securities Act of 1933, as amended (the “Securities Act”)) nor any person acting on its or their behalf has engaged or will engage in any “directed selling efforts” (as defined in Regulation S under the Securities Act (“Regulation S”)) in connection with the sale of the Shares.

(f) The Vendor reasonably believes that there is no “substantial U.S. market interest” (as defined in Regulation S) in the Shares or in any securities of the same class as the Shares.

(g) The Vendor is entitled to sell and transfer to the Purchaser the full legal and beneficial ownership of the Shares on the terms of this Agreement without the consent of any third party, subject to compliance with the Securities Act and any other applicable securities Law.

(h) The execution, delivery and performance of this Agreement has been duly authorized by all necessary corporate action on the part of the Vendor.

(i) This Agreement constitutes a valid and legally binding obligation of the Vendor, enforceable against the Vendor in accordance with its terms subject to applicable bankruptcy, insolvency, reorganization and other laws of general application limiting the enforcement of creditors’ rights generally and to the fact that specific performance is an equitable remedy available only in the discretion of the court.

(j) There is no contract, option or any other right of another binding upon or which at any time in the future may become binding upon the Vendor to sell, transfer, assign, pledge, charge, mortgage or in any other way dispose of or encumber any of the Shares other than pursuant to the provisions of this Agreement and the Securities Purchase Agreement between the Purchaser and the Vendor dated August 28, 2012 (the “August Agreement”).

(k) There is no outstanding voting trust, proxy or other similar agreement with respect to the voting of the Shares, other than the proxy granted to the Purchaser as contemplated under the terms of this Agreement and the proxies granted to the Purchaser with respect to certain other common shares of the Corporation pursuant to the August Agreement and the Securities Purchase Agreement between XXX and the Purchaser dated August 28, 2012.

- 5 -

(l) To the Vendor’s knowledge, neither entering into nor the delivery of this Agreement nor the completion of the transactions contemplated hereby by the Vendor will result in the violation of:

(i) any of the provisions of the constating documents or by-laws of the Vendor;

(ii) any contract (written or oral) or other instrument to which the Vendor is a party or by which the Vendor is bound; or

(iii) any law, statute, rule, regulation, or any existing applicable decree, judgment, or order by any court, administrative agency, or other governmental body (collectively, “Law”), in respect of which the Vendor must comply.

(m) The Vendor is not a non-resident person under the Income Tax Act (Canada).

(n) The Vendor has not disclosed to the Purchaser any confidential or material, non-public information concerning the Shares or the Corporation.

The representations and warranties of the Vendor set forth in Section 7 will survive the Closing.

8. Purchaser’s Representations and Warranties

The Purchaser represents and warrants to the Vendor that:

(a) The Purchaser is a corporation duly incorporated, organized and subsisting under the laws of the Province of Ontario.

(b) The Purchaser has good and sufficient power, authority and right to enter into and deliver this Agreement and to complete the transactions to be completed by the Purchaser contemplated hereby.

(c) The execution, delivery and performance of this Agreement has been duly authorized by all necessary corporate action on the part of the Purchaser.

(d) This Agreement constitutes a valid and legally binding obligation of the Purchaser, enforceable against the Purchaser in accordance with its terms subject to applicable bankruptcy, insolvency, reorganization and other laws of general application limiting the enforcement of creditors’ rights generally and to the fact that specific performance is an equitable remedy available only in the discretion of the court.

(e) To the Purchaser’s knowledge, neither the entering into nor the delivery of this Agreement nor the completion of the transactions contemplated hereby by the Purchaser will result in a violation of:

(i) any of the provisions of the constating documents or by-laws of the Purchaser;

- 6 -

(ii) any contract (written or oral) or other instrument to which the Purchaser is a party or by which the Purchaser is bound; or

(iii) any applicable Law in respect of which the Purchaser may comply.

(f) The Purchaser has had the opportunity to seek independent legal and/or tax advice in connection with the purchase of the Shares and had conducted its own due diligence with respect to the merits of the purchase.

(g) The Vendor has not provided the Purchaser with any confidential or material, non-public information concerning the Shares or the Corporation.

(h) As of the date hereof, no actions or filings are required to be made by the Purchaser in respect of this Agreement other than as required under the applicable securities Laws.

The representations and warranties of the Purchaser set forth in Section 8 will survive the Closing.

9. Further Acknowledgement and Agreement of the Purchaser

The Purchaser acknowledges that Shares have not been and will not be registered under the Securities Act, and may not be offered or sold within the United States except in accordance with Regulation S or pursuant to an exemption from the registration requirements of the Securities Act.

10. Confidentiality

Except to the extent required by Law, rules or securities policies, including the rules or policies of any relevant stock exchange, (i) no public announcement or news release concerning the matters provided for in this Agreement may be made by the Purchaser without the Vendor’s prior written consent and (ii) no copy of this Agreement may be provided by the Purchaser to any person (except to its Affiliates, and their respective directors, officers, employees, advisors or lenders (collectively, “Purchaser Representatives”) without the Vendor’s prior consent. The Purchaser shall be entitled to disclose confidential information only to those Purchaser Representatives who, in all cases, need to know such confidential information, directed to hold such information in the strictest of confidence and agree and undertake to maintain the confidential nature of such confidential information and act in accordance with the terms of this provision. To the extent that the Purchaser must make the contents of this Agreement public under the terms of applicable Laws, the Purchaser agrees to omit or censor, in consultation with the Vendor, acting reasonably, any information that would be prejudicial to the interests of the Vendor or the Purchaser, to the extent permitted pursuant to applicable Laws.

The Purchaser hereby consents and agrees to be responsible for any breach of this Section 9 by Purchaser Representatives, whether or not they agree in writing to be bound by its terms.

- 7 -

11. Statutory References

In this Agreement, unless something in the subject matter or context is inconsistent therewith or unless otherwise herein provided, a reference to any statute is to that statute as now enacted or as the same may from time to time be amended, re-enacted or replaced and includes any regulation made thereunder.

12. Headings

The division of this Agreement into Sections and the insertion of headings are for convenience of reference only and will not affect the construction or interpretation of this Agreement. The terms “hereof”, “hereunder” and similar expressions refer to this Agreement and not to any particular Section or other portion hereof and include any agreement supplemental hereto. Unless something in the subject matter or context is inconsistent therewith, references herein to Sections are to Sections of this Agreement.

13. Currency

All references in this Agreement to sums of money are expressed in, and all payments provided for herein shall be made in Canadian dollars, and “$” refers to Canadian dollars.

14. Further Assurances

Each of the Vendor and the Purchaser will promptly do, make, execute or deliver, or cause to be done, made, executed or delivered, all such further documents and instruments and do all acts and things as the other party may, either before or after the Closing, reasonably require to effectively carry out or better evidence or perfect the full intent and meaning of this Agreement. If required by applicable securities Laws, each of the Vendor and the Purchaser will execute, deliver and file or assist the other party in filing such reports, undertakings and other documents with respect to the sale of the Securities as may be reasonably required by any securities commission, stock exchange or other regulatory authority.

15. Entire Agreement

This Agreement, including Schedules attached hereto, sets forth the entire agreement and understanding between the parties with respect to the subject matter hereof and supersedes any and all prior discussions, negotiations, letters of intent or agreements in principle between them.

16. Binding Effect; No Third Party Beneficiaries

This Agreement shall be binding upon and shall inure to the exclusive benefit of the parties hereto and their respective heirs, executors, administrators, legal representatives, successors and permitted assigns and nothing herein, express or implied, is intended to, nor shall it, confer in any other person any legal or equitable right, benefit or remedy of any nature whatsoever under or by reason of this Agreement.

- 8 -

17. Amendment

No amendment to this Agreement may be made unless agreed to by the parties hereto in writing.

18. Assignability

No Party hereto shall sell, pledge, assign or otherwise transfer its rights under this Agreement without the prior written consent of the other parties and any attempt to do so shall be void, except that Purchaser may assign or transfer its rights under this Agreement to any Affiliate of the Purchaser without the Vendor’s consent.

19. Waiver

No failure or delay by the Purchaser or the Vendor in exercising any right hereunder or any partial exercise thereof shall operate as a waiver thereof or preclude any other or further exercise of any right hereunder, nor shall any waiver constitute a continuing waiver unless otherwise expressly provided.

20. Governing Law

This Agreement is and shall be deemed to be a contract entered into and made pursuant to the laws of the Province of Ontario and the laws of Canada applicable therein and shall in all respects be governed, construed, applied and enforced in accordance with said laws, without reference to applicable conflict of laws rules or principles.

21. Time of the Essence

Time is of the essence in this Agreement.

22. Counterparts

This Agreement may be executed in counterparts, each of which will be deemed to be an original and both of which taken together will be deemed to constitute one and the same instrument.

23. Electronic Delivery

Delivery of an executed signature page to this Agreement by either party by facsimile or by PDF via electronic transmission will be as effective as delivery of a manually executed copy of the Agreement by such party.

[Remainder of page left intentionally blank]

- 9 -

IN WITNESS WHEREOF the parties have executed this Agreement.

BROOKFIELD BRP HOLDINGS (CANADA) INC.
By:		/s/ Xxxxx Xxxxxxx
		Name:		Xxxxx Xxxxxxx
		Title:		Assistant Secretary
By:		/s/ Xxxxxxxx Xxxx
		Name:		Xxxxxxxx Xxxx
		Title:		Secretary, Senior Vice President of Legal Services and General Counsel

XXX, by its manager, GCIC Ltd.
By:		/s/ Xxxx Xxxx
for		Name:		Xxxxx Xxxxxx
		Title:		Chief Investment Strategist Vice President, Portfolio Manager
By:		/s/ Xxxx Xxxxxx
		Name:		Xxxx Xxxxxx
		Title:		Vice President Compliance & Administration Investment Counsel

- 10 -

SCHEDULE A

FORM OF INSTRUCTION LETTER

BY COURIER

October 16, 2012

Western Wind Energy Corp.

Suite 1326, HSBC Building 000

Xxxx Xxxxxxx Xxxxxx Xxxxxxxxx,

XX

Xxxxxx X0X 0X0

Attention: Legal Department

Re: Sale of 277,103 Western Wind Energy Corp. shares Dear

Sir/Madam,

In connection with the sale of 277,103 Western Wind Energy Corp. shares (the “Shares”) by XXX, by its manager, GCIC Ltd. (the “Vendor”) to Brookfield BRP Holdings (Canada) Inc. (the “Purchaser”) pursuant to a securities purchase agreement between the Vendor and the Purchaser dated October 15, 2012 (the “Closing Date”), we kindly request that you please reflect the said transfer of Shares in your register so that the Purchaser is shown therein as the legal and beneficial owner of Shares as of the Closing Date. The original certificate representing the Shares currently registered in Vendor’s name has been sent to your transfer agent and we request that, upon its receipt of the certificate, you cause to be issued in the name of the Purchaser a new certificate representing the Shares. The Purchaser has requested that the Shares be issued without a restrictive legend. If you have any questions with respect to the Purchaser’s request, please contact Xxxxxxxx Xxxx, Senior Vice-President, General Counsel and Corporate Secretary of the Purchaser directly at 000-000-0000 or xxxxxxxx.xxxx@xxxxxxxxxxxxxxxxxxx.xxx.

The new certificate should be delivered to the Purchaser in accordance with the Purchaser’s delivery instructions enclosed in Schedule A hereto.

The transfer of Shares was affected pursuant to Regulation S under the Securities Act of 1933, as amended. In accordance with the requirements set out in the legend attached to the certificate representing the Shares, enclosed please find a legal opinion of Drinker Xxxxxx & Xxxxx LLP, our US legal counsel on this transaction.

Please do not hesitate to contact me if you have any questions with respect to the above.

Best regards,

Xxxxxxxx Xxxxx Legal

Counsel

GCIC Ltd

cc: Xxxxxxx XxXxxxxx, Partner, DrinkerBiddle (via email)

Xxxxxxxx Xxxx, Senior Vice-President of Legal Services & General Counsel, Brookfield BRP Holdings (Canada) Inc. (via email)

- 2 -

SCHEDULE A

PURCHASER’S DELIVERY INSTRUCTIONS

Brookfield Renewable Energy Group

0000-000 Xxxx Xxxxxx

Xxxxxx, Xxxxxxx, XXX 0B6

Attn: Xxxxxxxx Xxxx

- 3 -

SCHEDULE B

FORM OF IRREVOCABLE PROXY

The undersigned, being the beneficial owner of the below described common shares of Western Wind Energy Corp., a corporation incorporated under the laws of the Province of British Columbia (“Western Wind”), for consideration received, hereby make, constitute and appoint, Brookfield BRP Holdings (Canada) Inc. (“Brookfield”), and any of Brookfield’s officers and directors, its true and lawful attorneys, for and in its name, place and stead, to act as its proxy, with full power of substitution and resubstitution, to Vote (as defined below) the 277,103 common shares of Western Wind owned by the undersigned (the “Shares”) on the date hereof.

“Vote” means voting in person or by proxy in favor of or against any action, otherwise consenting to a resolution in writing or withholding such written consent in respect of any action or taking other action in favor of or against any action.

This proxy applies to any Vote (i) at any meeting of the shareholders of Western Wind, and any adjournment or postponement thereof, or (ii) in connection with any unanimous written resolution of shareholders of Western Wind.

This proxy is coupled with an interest, revokes all prior proxies granted by the undersigned in respect of the Shares and shall remain irrevocable so long as the Shares are owned by the undersigned.

Dated October 16, 2012

XXX, by its manager, GCIC Ltd.
By:		/s/ Xxxx Xxxx
for		Name:		Xxxxx Xxxxxx
		Title:		Chief Investment Strategist Vice President, Portfolio Manager
By:		/s/ Xxxx Xxxxxx
		Name:		Xxxx Xxxxxx
		Title:		Vice President Compliance & Administration Investment Counsel

- 4 -