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                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                                 ---------------

                                  SCHEDULE TO/A
                  TENDER OFFER STATEMENT UNDER SECTION 14(D)(1)
           OR SECTION 13(E)(1) OF THE SECURITIES EXCHANGE ACT OF 1934
                                 AMENDMENT NO. 3
                                 ---------------

                        SOMNUS MEDICAL TECHNOLOGIES, INC.
                       (Name of subject company (issuer))

                            GYRUS GROUP PLC (Offeror)
                 GYRUS ACQUISITION, INC. (Affiliate of Offeror)
                      (Names of filing persons (offerors))

                                 ---------------

                    COMMON STOCK, PAR VALUE $0.001 PER SHARE
            Including the Associated Preferred Stock Purchase Rights
                         (Title of Class of Securities)

                                   835397-10-0
                      (CUSIP Number of Class of Securities)

                                   Tom Murphy
                             Chief Financial Officer
                             Gyrus Acquisition, Inc.
                               c/o Gyrus Group PLC
                            Fortran Road, St. Mellons
                                 Cardiff CF3 0LT
                                 United Kingdom
                                 44 1189 219 750
                  (Name, address and telephone number of person
                        authorized to receive notices and
                   communications on behalf of filing persons)

                                   Copies to:
                              John T. Kramer, Esq.
                              Dorsey & Whitney LLP
                             220 South Sixth Street
                          Minneapolis, Minnesota 55402
                            Telephone: (612) 340-2600

                            CALCULATION OF FILING FEE
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     Transaction Valuation*                      Amount of Filing Fee**
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          $59,694,211                                   $11,939
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*   For purposes of calculating the filing fee only, this calculation assumes
    the purchase of 20,627,861 shares of common stock of Somnus, including the
    associated preferred stock purchase rights (together, the "Shares") at the
    tender offer price of $3.11 per Share. The Shares include both 17,355,986
    shares of common stock outstanding as of May 3, 2001, 1,770,794 options and
    67,500 warrants.
**  The amount of the filing fee, calculated in accordance with Rule 0-11 of the
    Securities Exchange Act of 1934, as amended, equals 1/50 of 1% of the
    transaction valuation.
~   Check the box if any part of the fee is offset as provided by Rule
    0-11(a)(2) and identify the filing with which the offsetting fee was
    previously paid. Identify the previous filing by registration statement
    number or the form or schedule and the date of its filing.
         Amount Previously Paid:    $11,939
         Filing Party:              Gyrus Acquisition, Inc. and Gyrus Group PLC
         Form or Registration No.:  Schedule TO
         Date Filed:                May 7, 2001
|_| Check the box if the filing relates to preliminary communications made
before the commencement of a tender offer.
|_| Check the appropriate boxes below to designate any transactions to which the
statement relates:
     |X| third-party tender offer subject to Rule 14d-1.
     |_| issuer tender offer subject to Rule 13e-4.
     |_| going-private transaction subject to Rule 13e-3.
     |_| amendment to Schedule 13d under Rule 13d-2.
Check the following box if the filing is a final amendment reporting the results
of the tender offer: |_|

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         This Amendment No. 3 amends and supplements the Tender Offer Statement
on Schedule TO (as amended and supplemented, the "SCHEDULE TO") filed with the
Securities and Exchange Commission on May 7, 2001 by Gyrus Acquisition, Inc., a
Delaware corporation (the "PURCHASER") and a wholly owned subsidiary of Gyrus
Group PLC, a public limited company incorporated and existing under the laws of
England and Wales ("PARENT"). The Schedule TO relates to the offer by the
Purchaser to purchase all the outstanding shares of common stock, par value
$0.001 per share (the "COMMON STOCK"), of Somnus Medical Technologies, Inc., a
Delaware corporation (the "COMPANY"), including the associated preferred stock
purchase rights (the "RIGHTS") issued pursuant to the Rights Agreement, dated as
of November 6, 1998, between the Company and American Securities Transfer,
Incorporated, as Rights Agent (the Common Stock and the Rights together are
referred to herein as the "SHARES"), at a purchase price of $3.11 per Share, net
to the seller in cash, without interest thereon, upon the terms and subject to
the conditions set forth in the Offer to Purchase dated May 7, 2001 (the "OFFER
TO PURCHASE"), and in the related Letter of Transmittal, copies of which were
filed with the Schedule TO as Exhibits (a)(1)(A) and (a)(1)(B), respectively.
This Amendment No. 3 to Schedule TO is being filed on behalf of the Purchaser
and Parent.

         The information contained in the Schedule TO concerning the Company,
including, without limitation, information concerning the approvals and
recommendations of the Board of Directors of the Company in connection with the
transaction, the opinion of the financial advisor to such Board of Directors,
and the Company's capital structure and financial information, was supplied by
the Company. Purchaser takes no responsibility for the accuracy of such
information.

ITEM 11.  ADDITIONAL INFORMATION.

         Item 11 is hereby amended and supplemented by the following:

         The initial offering period of the Offer expired at 11:59 p.m., New
York City time, on Monday, June 4, 2001. Pursuant to the Offer and based on the
report of the Depositary, the Purchaser has accepted for payment 14,968,935
Shares that were validly tendered and not withdrawn (including approximately
901,075 shares tendered by guaranteed delivery). This number represents
approximately 86.25% of the outstanding Shares.

         On June 5, 2001, Parent and the Purchaser issued a press release
announcing the completion of the initial offering period and the commencement of
the subsequent offering period, which will expire at 11:59 p.m., New York City
time, on Monday, June 11, 2001, a copy of which release is attached hereto as
Exhibit (a)(1)(J) and is incorporated hereby by reference.

ITEM 12.  EXHIBITS.

EXHIBIT NUMBER    DESCRIPTION

* (a)(1)(A) -- Offer to Purchase dated May 7, 2001.

* (a)(1)(B) -- Letter of Transmittal.

* (a)(1)(C) -- Notice of Guaranteed Delivery.

* (a)(1)(D) -- Letter to Brokers, Dealers, Banks, Trust Companies and Other
               Nominees.

* (a)(1)(E) -- Letter to Clients for use by Brokers, Dealers, Banks, Trust
               Companies and Other Nominees.

* (a)(1)(F) -- Guidelines for Certification of Taxpayer
               Identification Number on Substitute Form W-9.

* (a)(1)(G) -- Press Release issued by Parent on May 4, 2001.

* (a)(1)(H) -- Summary Advertisement published May 7, 2001.

* (a)(1)(I) -- Press Release issued by Parent on May 29, 2001.

  (a)(1)(J) -- Press Release issued by Parent on June 5, 2001.





* (d)(1)    -- Agreement and Plan of Merger, dated as of May 4, 2001, among
               Parent, the Purchaser and the Company.

* (d)(2)    -- Company Stockholder Agreement, dated May 3, 2001, , between
               Parent and each of certain stockholders of the Company.
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* Previously filed.





                                   SIGNATURES

         After due 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.



                               GYRUS ACQUISITION, INC.


                               By:  /s/ Mark Goble
                                  ----------------------------------------------
                                    NAME:    Mark Goble, M.D.
                                    TITLE:   Chief Executive Officer



                               GYRUS GROUP PLC


                               By:  /s/ Mark Goble
                                  ----------------------------------------------
                                    NAME:    Mark Goble, M.D.
                                    TITLE:   Group Managing Director

DATED:  June 5, 2001




                                INDEX TO EXHIBITS


EXHIBIT       NUMBER DOCUMENT

*(a)(1)(A)     Offer to Purchase dated May 7, 2001.

*(a)(1)(B)     Letter of Transmittal.

*(a)(1)(C)     Notice of Guaranteed Delivery.

*(a)(1)(D)     Letter to Brokers, Dealers, Banks, Trust Companies and Other
               Nominees.

*(a)(1)(E)     Letter to Clients for use by Brokers, Dealers, Banks, Trust
               Companies and Other Nominees.

*(a)(1)(F)     Guidelines for Certification of Taxpayer Identification Number on
               Substitute Form W-9.

*(a)(1)(G)     Press Release issued by Parent on May 4, 2001.

*(a)(1)(H)     Summary Advertisement published May 7, 2001.

*(a)(1)(I)     Press Release issued by Parent on May 29, 2001.

(a)(1)(J)      Press Release issued by Parent on June 5, 2001.

(b)            Not applicable.

*(d)(1)        Agreement and Plan of Merger, dated as of May 4, 2001, among
               Parent, the Purchaser and the Company.

*(d)(2)        Company Stockholder Agreement, dated May 3, 2001, between Parent
               and each of certain stockholders of the Company.

(g)            Not applicable.

(h)            Not applicable.

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* Previously filed.