MFN Minefinders Corp. Ltd. Ordinary Shares

CUSIP No. 602900102 Schedule 13G Page 2 of 5 Pages
 ----------- --------------

1. NAMES OF REPORTING PERSONS
 I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)

 M&G Investment Management Limited
 No I.R.S Identification Number
--------------------------------------------------------------------------------
2. CHECK THE APPROPRIATE BOX IF THE MEMBER OF A GROUP*
 (a) [ ]
 (b) [ ]
--------------------------------------------------------------------------------
3. SEC USE ONLY
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4. CITIZENSHIP OR PLACE OF ORGANIZATION
 United Kingdom, England
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 5. SOLE VOTING POWER
NUMBER OF 0
SHARES ------------------------------------------------------------
BENEFICIALLY 6. SHARED VOTING POWER
OWNED BY 1,552,200

EACH ------------------------------------------------------------
REPORTING 7. SOLE DISPOTIVE POWER
PERSON 0
WITH ------------------------------------------------------------
 8. SHARED DISPOTIVE POWER
 13,347,600
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9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
 13,347,600
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10. CHECK BOX IF AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN
 SHARES* [_]
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11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
 14.86%
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12. TYPE OF REPORTING PERSON
 IA
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CUSIP No. 602900102 Schedule 13G Page 3 of 5 Pages
 ----------- --------------
Item 1(a). Name of Issuer:

 Minefinders Corporation Ltd

Item 1(b). Address of Issuer's Principal Executive Offices:

1177 West Hastings Street, Vancouver, BC V6E 2K3, Canada

Item 2(a). Name of Person Filing:

 1. M&G Investment Management Limited (MAGIM)

Item 2(b). Address of Principal Business Office or, if None,
 Residence:

 Governor's House, Laurence Pountney Hill, London, EC4R 0HH

Item 2(c). Citizenship:

 United Kingdom, England

Item 2(d). Title of Class of Securities:

 Common Stock

Item 2(e). CUSIP Number:

 602900102

Item 3. Type of Person:
 MAGIM is an investment advisor in accordance with
 s.240.13d-1(b)(1)(ii)(E)

Some of the securities covered by this report are owned legally by
Vanguard precious Metals and Mining Fund, MAGIMs investment advisory client.
 MAGIM has sole investment power and no voting power in these
 securities.



Item 4. Ownership.
 Provide the following information regarding the aggregate
 number and percentage of the class of securities of the issuer
 identified in Item 1.

(a) Amount Beneficially Owned: M&G, in its capacity as investment manager,
 may be deemed to beneficially owned: 13,347,600 shares

 (b) Percent of Class: 14.86%

 M&G Investment Management Limited
 (i) sole power to vote or to direct the vote 0
 ----------
 (ii) shared power to vote or to direct the
 vote 1,552,200
 ----------
 (iii) sole power to dispose or to direct the
 disposition of 0
 ----------
 (iv) shared power to dispose or to direct the
 disposition of 13,347,600
 ----------





















CUSIP No. 602900102 Schedule 13G Page 4 of 5 Pages
 ----------- --------------

Item 5. Ownership of Five Percent or Less of Class.
 If this statement is being filed to report the fact that as of the
 date hereof the reporting person has ceased to be the beneficial
 owner of more than five percent of the class of securities, check
 the following

 Not applicable.

Item 6. Ownership of More than Five Percent on Behalf of Another
 Person.

 Not applicable.

Item 7. Identification and Classification of the Subsidiary Which
 Acquired the Security Being Reported on by the Parent Holding
 Company.

 Not applicable.

Item 8. Identification and Classification of Members of the Group.


 Not applicable.


Item 9. Notice of Dissolution of Group.

 Not Applicable








CUSIP No. 602900102 Schedule 13G Page 5 of 5 Pages
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Item 10. Certification.
 -------------

 (a) The following certification shall be included if the statement
 is filed pursuant to Rule 13d-1(b):

 "By signing below I certify that, to the best of my knowledge
 and belief, the securities referred to above were acquired
 and are held in the ordinary course of business and were not
 acquired and are not held for the purpose of or with the
 effect of changing or influencing the control of the issuer of
 the securities and were not acquired and are not held in
 connection with or as a participant in any transaction
 having that purpose or effect. "


 SIGNATURE


 After reasonable inquiry and to the best of my knowledge and belief,
 I certify that the information set forth in this statement is true,
 complete and correct.


 By: --//Mark Thomas//--
 --------------------------------------
 Name: Mark Thomas
 Title: Head of Notifiable Reporting
 Date: March 20, 2012