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