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EXHIBIT 12.1






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|1. | I have reviewed this annual report on
    Form 20-F for the
    year ended March 31, 2006 of M (2003) plc (the
    Company);                                                                                                                                                                                                              
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|2. | Based on my knowledge, this annual report does not contain any
    untrue statement of a material fact or omit to state a material
    fact necessary to make the statements made, in light of the
    circumstances under which such statements were made, not
    misleading with respect to the period covered by this annual
    report;
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|3. | Based on my knowledge, the financial statements, and other
    financial information included in this annual report, fairly
    present in all material respects the financial condition,
    results of operations and cash flows of the Company as of, and
    for, the periods presented in this annual report;                          
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|4. | The Companys other certifying officer and I are
    responsible for establishing and maintaining disclosure controls
    and procedures (as defined in Exchange Act
    Rules 13a-15(e)
    and 15d-15(e)) for the
    Company and have:                                                                                                   



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| | (a) | designed such disclosure controls and procedures, or caused such
    disclosure controls and procedures to be designed under our
    supervision, to ensure that material information relating to the
    Company, including its consolidated subsidiaries, is made known
    to us by others within those entities, particularly during the
    period in which this annual report is being prepared;
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| | (b) | evaluated the effectiveness of the Companys disclosure
    controls and procedures and presented in this report our
    conclusions about the effectiveness of the disclosure controls
    and procedures, as of the end of the period covered by this
    report based on such evaluation; and                                                                                                      
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| | (c) | disclosed in this report any change in the Companys
    internal control over financial reporting that occurred during
    the period covered by the annual report that has materially
    affected, or is reasonably likely to materially affect, the
    Companys internal control over financial
    reporting; and                                                                              



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|5. | The Companys other certifying officer and I have
    disclosed, based on our most recent evaluation of internal
    control over financial reporting, to the Companys auditors
    and the audit committee of the Companys board of directors
    (or persons performing the equivalent function):



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| | (a) | all significant deficiencies and material weaknesses in the
    design or operation of internal controls over financial
    reporting which are reasonably likely to adversely affect the
    Companys ability to record, process, summarize and report
    financial information; and
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| | (b) | any fraud, whether or not material, that involves management or
    other employees who have a significant role in the
    Companys internal control over financial reporting.                                                                                                        





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| | /s/ John Jameson White         
| |                                
| | Name: John Jameson White       
| | Title:  Chief Executive Officer