SIGNATURES

Pursuant to the requirements of Section 12 of the Securities Exchange Act of 1934, the registrant, Allied Irish Banks, p.l.c., certifies that it meets all of the requirements for filing on Form 20-F
and has duly caused this annual report to be signed on its behalf by the undersigned, thereunto duly authorized, on the 8 March 2010.



ALLIED IRISH BANKS, p.l.c.(Registrant)By:

/s/ MAELIOSA OhOGARTAIGHName:

Maeliosa OhOgartaighTitle:

Acting Group Chief Financial Officer




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Certification

Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

I,
Colm Doherty, Group Managing Director, certify that:

1. I have reviewed this Annual Report on Form 20-F of Allied Irish Banks, p.l.c.
(AIB);

2. Based on my knowledge, this 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 report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash
flows of AIB as of, and for, the periods presented in this report;

4. AIB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)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for AIB and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed by
others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such
internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of
financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the
effectiveness of AIB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

(d) Disclosed in this report any change in AIBs internal control over financial reporting that occurred
during the period covered by this report that has materially affected, or is reasonably likely to materially affect, AIBs internal control over financial reporting; and

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

(a) All significant deficiencies and material weaknesses
in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect AIBs ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in AIBs

internal control over financial reporting.



|                    |  |        |  |                        
|------------------- |  | ------ |  | -----------------------
|Dated: 8 March 2010 |  |        |  | /s/ COLM DOHERTY       
|                    |  | Name:  |  | Colm Doherty           
|                    |  | Title: |  | Group Managing Director



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Certification

Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

I,
Maeliosa OhOgartaigh, Acting Group Chief Financial Officer, certify that:

1. I have reviewed this Annual Report on Form 20-F of Allied
Irish Banks, p.l.c. (AIB);

2. Based on my knowledge, this 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 report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the
financial condition, results of operations and cash flows of AIB as of, and for, the periods presented in this report;

4. AIB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)) and internal control over financial reporting (as defined in Exchange Act Rules
13a-15(f) and 15d-15(f)) for AIB and have:

(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 AIB, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which
this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control
over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted
accounting principles;

(c) Evaluated the effectiveness of AIB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

(d) Disclosed in this report any change in AIBs internal control over financial reporting that occurred during the period covered by this report that has materially affected, or is reasonably likely
to materially affect, AIBs internal control over financial reporting; and

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

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are
reasonably likely to adversely affect AIBs ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in

AIBs internal control over financial reporting.



|                    |  |        |  |                                     
|------------------- |  | ------ |  | ------------------------------------
|Dated: 8 March 2010 |  |        |  | /s/ MAELIOSA OhOGARTAIGH           
|                    |  | Name:  |  | Maeliosa OhOgartaigh               
|                    |  | Title: |  | Acting Group Chief Financial Officer



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Certification

Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

Pursuant to section 906 of the Sarbanes-Oxley Act of 2002 (subsections (a) and (b) of section 1350, chapter 63 of title 18, United States Code), the undersigned officer of Allied Irish Banks, p.l.c., a public limited liability
company incorporated and registered in Ireland (the Company), hereby certifies, to such officers knowledge, that:

The Annual Report on Form 20-F for the year ended 31 December 2009 (the Report) of the Company fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934 and information contained
in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.



|                   |  |        |  |                        
|------------------ |  | ------ |  | -----------------------
|Date: 8 March 2010 |  |        |  | /s/ COLM DOHERTY       
|                   |  | Name:  |  | Colm Doherty           
|                   |  | Title: |  | Group Managing Director

The foregoing
certification is being furnished solely pursuant to section 906 of the Sarbanes-Oxley Act of 2002 (subsections (a) and (b) of section 1350, chapter 63 of title 18, United States Code) and is not being filed as part of the Report or as a
separate disclosure document.



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Certification

Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

Pursuant to section 906 of the Sarbanes-Oxley Act of 2002 (subsections (a) and (b) of section 1350, chapter 63 of title 18, United States Code), the undersigned officer of Allied Irish Banks, p.l.c., a public limited liability
company incorporated and registered in Ireland (the Company), hereby certifies, to such officers knowledge, that:

The Annual Report on Form 20-F for the year ended 31 December 2009 (the Report) of the Company fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934 and information contained
in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.



|                    |  |        |  |                                     
|------------------- |  | ------ |  | ------------------------------------
|Dated: 8 March 2010 |  |        |  | /s/ MAELIOSA OhOGARTAIGH           
|                    |  | Name:  |  | Maeliosa OhOgartaigh               
|                    |  | Title: |  | Acting Group Chief Financial Officer

The
foregoing certification is being furnished solely pursuant to section 906 of the Sarbanes-Oxley Act of 2002 (subsections (a) and (b) of section 1350, chapter 63 of title 18, United States Code) and is not being filed as part of the Report
or as a separate disclosure document.