SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C. 20549


                                    FORM 6-K


                        Report of Foreign Private Issuer


                       Pursuant to Rule 13a-16 or 15d-16
                     of the Securities Exchange Act of 1934


                          For the month of May, 2006

                              RYANAIR HOLDINGS PLC
                (Translation of registrant's name into English)

                     c/o Ryanair Ltd Corporate Head Office
                                 Dublin Airport
                             County Dublin Ireland
                    (Address of principal executive offices)


Indicate by check mark whether the registrant files or will file annual
reports under cover Form 20-F or Form 40-F.

                         Form 20-F..X.. Form 40-F.....


Indicate by check mark whether the registrant by furnishing the information
contained in this Form is also thereby furnishing the information to the
Commission pursuant to Rule 12g3-2(b) under the Securities Exchange
Act of 1934.

                               Yes ..... No ..X..


If "Yes" is marked, indicate below the file number assigned to the registrant
in connection with Rule 12g3-2(b): 82- ________






Ryanair Holdings Plc

02 May 2006

A Letter from Wellington Management Company llp to Ryanair Holdings, received by
Ryanair Holdings 28 April 2006.



                                               Wellington Management Company,llp

                                                                 75 State Street

                                                                          Boston

                                                             Massachusetts 02109



                                                       Telephone: (617) 951-5000

                                                             Fax: (617) 951-5250



28 April 2006



Company Secretary

Mr. Jim Callaghan

Ryanair Holdings plc

C/O Ryanair Ltd Corporate Head Office

Dublin Airport

County Dublin

Ireland L2



Re:  Notification concerning interests in shares of Ryanair Holdings plc (the "
Company")



Dear Mr. Callaghan:



1

Wellington Management Company, LLP ("Wellington Management") is registered as an
investment adviser with the United States Securities and Exchange Commission and
acts as discretionary investment manager on behalf of various separate accounts
(the "Accounts") that hold an interest in shares of the Company.  Wellington
Management's interest in the shares is as an investment manager, as is mentioned
in Sections 67(1) and 77(4)(B) of the Companies Act 1990 (the "Act").  The
Accounts do not act as a group nor do they act in concert with respect to the
interests in shares.  Wellington Management acquired the interests in shares for
the Accounts in its capacity as discretionary investment manager to, and solely
for the benefit of, the Accounts, and the interests were acquired solely for
investment purposes.  The shares are registered in the name of the Accounts or
the Accounts' custodians or nominees according to their respective holdings.


2

Wellington Management as discretionary investment manager on behalf of various

separate accounts, has purchased, in the aggregate, 1,225,510 ordinary shares
and 11,858,222 ADR shares. On a converted basis, this represents the equivalent
of 60,516,620 ordinary shares, or 7.86% of the shares outstanding, of the
Company. This is a decrease of 0.85% since our notification on 7 March 2006.
Therefore, Wellington Management hereby gives notice to the Company of such
interest in shares, pursuant to the provisions of Sections 67(1) and 77(4)(B) of
the Act.



Mr. Jim Callaghan

28 April 2006

Page Two



3

This notice is given in fulfillment of, and for the express purpose of
discharging the

obligations imposed on us by, Sections 67(1) and 77(4)(B) of the Act and arising
out of the circumstances referred to in paragraph 2.

If you have any questions or comments, please do not hesitate to contact me at

617-790-7745.


Regards,


Julie A. Jenkins

Vice President and Counsel

Wellington Management Company, LLP





This announcement has been issued through the Companies Announcement Service of



The Irish Stock Exchange




                                   SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the
Registrant has duly caused this report to be signed on its behalf by the
undersigned, hereunto duly authorized.

                                    RYANAIR HOLDINGS PLC


Date:  02 May 2006

                                    By:___/s/ James Callaghan____

                                    James Callaghan
                                    Company Secretary & Finance Director