LONDON, May 12 /PRNewswire-FirstCall/ --
    Summary
    Quarter 1 2005
    The market decreased by 5.6% compared to the year to March 2004. CMP's
continuing titles, in the year to March 2005, recorded a 4.2% decrease in
advertising page volumes against the year to March 2004.
    Market share of CMP Media's continuing titles year to date was 26.9% up
from 26.5% in the prior year period.
    Trailing twelve months to March 2005
    The market decreased by 5.2% in advertising page volumes in the twelve
months ended March 2005 compared to the twelve months ended March 2004. CMP
Media's continuing High Tech publications recorded a 3.2% decrease in the
same period.
    NOTE: In February UBM announced that due to the progressive decline in
the significance of this indicator since its initial publication in 2001 UBM
would publish this analysis quarterly rather than monthly as previously.
Since February investors have indicated that these statistics have become of
such diminished relevance for UBM's overall performance that they would
prefer it if they were not published at all. Accordingly this will be the
last issuance of these statistics.
    MARKET SEGMENT - ADVERTISING PAGE VOLUMES
    QUARTER 1 2005

                                                     2005    2004
                                          Change   Market  Market
                           2005    2004 04 vs 03    Share   Share
                          Pages   Pages        %        %       %
    CMP Media
    Continuing            3,791   3,959    -4.2%    26.9%   26.5%
    Discontinued              0      63              0.0%    0.4%
    CMP Media Total       3,791   4,022    -5.7%    26.9%   26.9%

    Whole Market
    Continuing           14,108  14,887    -5.2%   100.0%   99.6%
    B2B Tech
    Publications         12,974  13,538    -4.2%    92.0%   90.6%
    General Business      1,134   1,349   -15.9%     8.0%    9.0%
    Discontinued              0      63              0.0%    0.4%
    Total Market         14,108  14,950    -5.6%   100.0%  100.0%


    MAJOR CMP TITLES

                                 Quarter 1 2005
                             +/- Pages  % Change
    Information Week            -111.5     -17.9
    EE Times                     -91.1     -12.6
    Dr Dobb's                     -8.4      -6.9
    Network Computing            -20.9      -7.1
    Network Magazine              -6.5      -5.8
    CRN                          -31.1      -5.9
    VAR Business                 -49.5     -14.7

    TWELVE MONTHS to Date

                                                    2005    2004
                            2005    2004  Change  Market  Market
                           Pages   Pages    %    Share % Share %
    CMP Media
    Continuing            17,598  18,173  -3.2%    26.8%   26.3%
    Discontinued             162   1,507            0.2%    2.2%
    CMP Media Total       17,760  19,680  -9.8%    27.0%   28.5%

    Whole Market
    Continuing            65,402  67,541   -3.2%   99.8%   97.7%

    B2B Tech Publications 58,872  60,587   -2.8%   89.8%   87.6%

    General Business       6,530   6,954   -6.1%   10.0%   10.1%

    Discontinued             162   1,606            0.2%    2.3%
    Total Market          65,564  69,147   -5.2%  100.0%  100.0%

                                            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
    - supplement 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 advertising page volumes
as counted above, they do not represent paid advertising page volumes nor do
they show the revenue yields which the operators in these market segments
have achieved.
    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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