LONDON, Oct. 23 /PRNewswire-FirstCall/ --
    Summary

    Month of September 2003
    The business information market serving the technology industry, measured
in terms of advertising page volumes, decreased by 15.7% the month of
September compared to September 2002.  CMP Media's continuing technology
publications recorded a 12.4% decrease against September 2002.
    CMP Media improved its market share compared to 2002 -- its continuing
titles held a share of 29.2% in September 2003 up from 28.1% in September
2002.

    Calendar Year to September
    The market decreased by 15.5% compared to the year to September 2002.
CMP's continuing titles, in the year to September 2003, recorded a 10.6%
decrease in advertising page volumes against the year to September 2002.
    Market share of CMP Media's continuing titles year to date was 29.3% up
from 27.7% in the prior year period.

    Rolling twelve months to September 2003
    The market decreased by 17.3% in advertising page volumes in the twelve
months ended September 2003 compared to the twelve months ended September
2002.  CMP Media's continuing High Tech publications recorded a 11.4% decrease
in the same period.


    MARKET SEGMENT - ADVERTISING PAGE VOLUMES

    MONTH OF September 2003


                                                           2003         2002
                                               Change    Market       Market
                             2003      2002   03 vs 02    Share       Share
                            Pages     Pages          %        %           %
    CMP Media
    Continuing              1,967     2,245    -12.4 %   29.2 %      28.1 %
    Discontinued                0        19               0.0 %       0.2 %

    CMP Media Total         1,967     2,264    -13.1 %   29.2 %      28.3 %

    Whole Market Continuing 6,735     7,723    -12.8 %  100.0 %      96.6 %
    B2B Tech Publications   5,995     6,970    -14.0 %   89.0 %      87.2 %

    General Business          740       753     -1.7 %   11.0 %       9.4 %


    Discontinued                0       269               0.0 %       3.4 %
    Total Market            6,735     7,992    -15.7 %  100.0 %     100.0 %


    CALENDAR YEAR TO September 2003

                                                           2003         2002
                                               Change    Market       Market
                             2003      2002   03 vs 02    Share       Share
                            Pages     Pages          %        %           %
    CMP Media
    Continuing             15,186    16,988    -10.6 %   29.3 %      27.7 %
    Discontinued               30       299               0.1 %       0.5 %

    CMP Media Total        15,216    17,287    -12.0 %   29.4 %      28.2 %

    Whole Market
     Continuing            51,573    58,150    -11.3 %   99.4 %      94.7 %
    B2B Tech Publications  46,408    52,803    -12.1 %   89.4 %      86.0 %

    General Business        5,165     5,347     -3.4 %   10.0 %       8.7 %

    Discontinued              308     3,269               0.6 %       5.3 %
    Total Market           51,881    61,419    -15.5 %  100.0 %     100.0 %


    TWELVE MONTHS to Date

                                                           2003         2002
                                               Change    Market       Market
                             2003      2002   03 vs 02    Share       Share
                            Pages     Pages          %        %           %
    CMP Media
    Continuing             20,856    23,543    -11.4 %   29.0 %      27.0 %
    Discontinued               77       775               0.1 %       0.9 %
    CMP Media Total        20,933    24,318    -13.9 %   29.1 %      27.9 %

    Whole Market
     Continuing            71,162    81,385    -12.6 %   98.8 %      93.5 %

    B2B Tech
     Publications          63,854    72,933    -12.4 %   88.7 %      83.8 %

    General Business        7,308     8,452    -13.5 %   10.1 %       9.7 %

    Discontinued              868     5,691               1.2 %       6.5 %
    Total Market           72,030    87,076    -17.3 %  100.0 %     100.0 %


    MAJOR CMP TITLES

                                  September 2003         YTD September 2003
                               + Pages     % Change   + Pages     % Change
            Information Week     -17.0        -5.3     -218.1        -10.4
            EE Times            -108.3       -25.7     -571.5        -19.7
            Dr Dobb's             -2.3        -3.8      -70.8        -13.2
            Network Computing    -31.1       -16.5      +43.5         +4.0
            ebn                  -29.3       -20.9     -407.2        -31.1
            Network Magazine     -19.2       -36.4     -188.9        -34.5
            CRN                  -20.3        -7.7     +102.4         +5.5
            VAR Business         +49.9       +37.6     +125.9        +12.2


    Source - IMS: Auditor

     Notes to Editors:
    CMP MEDIA LLC
    CMP Media LLC (http://www.cmp.com) is a leading integrated media company
providing essential information and marketing services to the entire
technology spectrum -- the builders, sellers and users of technology
worldwide. Capitalising on its editorial strength, CMP is uniquely positioned
to offer marketers comprehensive, integrated media solutions tailored to meet
their individual needs.  Its diverse products and services include newspapers,
magazines, Internet products, research, direct marketing services, education
and training, trade shows and conferences, and custom publishing.

    BASIS OF COMPILATION OF STATISTICS
    The statistics, which are the main subject of today's release, are
independently compiled by IMS/Auditor.  The basis of compilation includes:
     -- pages are hand counted and verified by the publishers
     -- regional ads are counted if in over 50% of circulation
     -- house ads are not counted
     -- inserts are counted if bound in publication
     -- the database will continually be updated as more accurate information
        arrives

    All CMP High Tech publications are tracked. CMP determines the competitive
set of publishing titles which are measured on its behalf by IMS Auditor and
periodically adjusts the population to ensure that it is properly
representative of the changing US business technology advertising market in
which CMP competes.

    Note: that these statistics represent only total technology advertising
page volumes as counted above, they therefore include unpaid page volumes and
do not show achieved revenue yields. Other material drivers of CMP Media's
overall revenue performance include the Healthcare business, online media and
exhibitions.

    This press release includes statements which are not historical facts and
are considered "forward-looking" within the meaning of Section 27 of the
Securities Act of 1933, as amended.  These forward-looking statements reflect
UBM's current views about future events, business and growth strategy and
financial performance. These forward-looking statements are identified by
their use of terms and phrases such as "believe," "expect," "plan,"
"anticipate," "on target" and similar expressions identifying forward-looking
statements. Investors should not rely on forward-looking statements because
they are subject to a variety of risks, uncertainties and other factors that
could cause actual results to differ materially from UBM's expectations.  UBM
expressly does not undertake any duty to update forward-looking statements.
Management does not attempt to update forecasts unless conditions materially
change.

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