Exhibit 99(n)

                             HEALTHWORLD CORPORATION

           SPECIAL MEETING OF STOCKHOLDERS TO BE HELD ON MARCH 1, 2000

           THIS PROXY IS SOLICITED ON BEHALF OF THE BOARD OF DIRECTORS

         The undersigned hereby constitutes and appoints Steven Girgenti and
Stuart Diamond, or either of them acting singly in the absence of the other,
with the power of substitution in either of them, the proxies of the undersigned
to vote with the same force and effect as the undersigned all shares of common
stock of Healthworld Corporation (the "Company") held of record by the
undersigned on February 4, 2000 at the Special Meeting of Stockholders (the
"Meeting") to be held at the offices of Rosenman & Colin LLP, 575 Madison
Avenue, 11th Floor, New York, New York 10022, on March 1, 2000, at 9:00 A.M.,
local time, and at any adjournment or adjournments thereof, hereby revoking any
proxy or proxies heretofore given and ratifying and confirming all that said
proxies may do or cause to be done by virtue thereof with respect to the
following matters:

1. The approval and adoption of the Agreement and Plan of Merger, dated as of
November 9, 1999, as amended on February 3, 2000, among Cordiant Communications
Group plc, Healthworld Acquisition Corp., a wholly-owned subsidiary of Cordiant,
and the Company, providing for the merger of Healthworld Acquisition Corp. with
and into the Company. After the merger, the Company will be an indirect
wholly-owned subsidiary of Cordiant. As a result of the merger, each share of
the Company's common stock issued and outstanding at the time of the merger will
be converted into the right to receive either Cordiant's American depositary
shares or, at each of the Company's stockholders' election, Cordiant ordinary
shares. The actual number of Cordiant ADSs or ordinary shares to be exchanged
for common stock of the Company by Cordiant in the merger will be determined by
a formula based upon the average of the price of Cordiant ordinary shares and
the average of the U.S. dollar/British pound sterling exchange rate, both
calculated during a specified period ending three days prior to the special
meeting.

        / / FOR                / / AGAINST                 / / ABSTAIN

2. Upon such other business as may properly come before the Meeting or any
adjournment thereof.





      THIS PROXY, WHEN PROPERLY EXECUTED, WILL BE VOTED AS DIRECTED. IF NO
DIRECTION IS INDICATED, THE PROXY WILL BE VOTED (I) FOR THE APPROVAL AND
ADOPTION OF THE AGREEMENT AND PLAN OF MERGER, DATED AS OF NOVEMBER 9, 1999, AS
AMENDED ON FEBRUARY 3, 2000, AMONG CORDIANT COMMUNICATIONS GROUP PLC,
HEALTHWORLD ACQUISITION CORP., AN INDIRECT WHOLLY-OWNED SUBSIDIARY OF CORDIANT,
AND THE COMPANY, PROVIDING FOR THE MERGER OF HEALTHWORLD ACQUISITION CORP. WITH
AND INTO THE COMPANY, AND (II) IN ACCORDANCE WITH THE JUDGMENT OF THE PERSON OR
PERSONS VOTING THE PROXIES ON ANY OTHER MATTER THAT MAY BE PROPERLY BROUGHT
BEFORE THE MEETING.

      The undersigned hereby acknowledges receipt of the Notice of Special
Meeting of Stockholders to be held on March 1, 2000 and the Proxy Statement,
dated February 7, 2000, prior to the signing of this proxy.


                                    Dated: _________________________________
                                    _______________________________(L.S.)
                                    _______________________________(L.S.)
                                    _______________________________(L.S.)
                                    Please sign your name exactly as it appears
                                    hereon. When signing as attorney, executor,
                                    administrator, trustee or guardian, please
                                    give your full title as it appears hereon.
                                    When signing as joint tenants, all parties
                                    in the joint tenancy must sign. When a proxy
                                    is given by a corporation, it should be
                                    signed by an authorized officer and the
                                    corporate seal affixed. No postage is
                                    required if returned in the enclosed
                                    envelope and mailed in the United States.
                                    PLEASE SIGN, DATE AND MAIL THIS PROXY
                                    IMMEDIATELY IN THE ENCLOSED ENVELOPE.