Datamonitor PLC

Extension of offer

Datamonitor PLC
04 December 2006



NOT FOR RELEASE, PUBLICATION OR DISTRIBUTION IN OR INTO THE UNITED STATES OF
AMERICA, CANADA OR JAPAN


4 December 2006


DATAMONITOR PLC ("DATAMONITOR")


RECOMMENDED CASH OFFER FOR OVUM PLC ("OVUM")


FOR IMMEDIATE RELEASE



EXTENSION OF OFFER AND LEVEL OF ACCEPTANCE


Extension of the Offer


Datamonitor announces that the Offer has been extended for a period of 14 days
and will remain open for acceptance until 3.00 p.m. (London time) on 15 December
2006.


Level of acceptances and Ovum Shares held by Datamonitor


As at 3.00pm (London time) on 1 December 2006, being the first closing date of
the Offer, valid acceptances of the Offer and Ovum Shares held by Datamonitor
together represented approximately 83.31 per cent. of the issued share capital
of Ovum.


As at 3.00pm (London time) on 1 December 2006, valid acceptances of the Offer
had been received in respect of a total of 9,193,033 Ovum Shares, representing
approximately 74.45 per cent. of the issued share capital of Ovum and 81.69 per
cent. of the Ovum Shares to which the Offer relates.  Datamonitor also held
1,093,635 Ovum Shares, representing approximately 8.86 per cent. of the issued
share capital of Ovum.  Datamonitor acquired those Ovum Shares on 24 October
2006, being prior to the making of the Offer.


On 20 October 2006, Datamonitor announced that it had received irrevocable
undertakings to accept the Offer from the Ovum Directors and certain other Ovum
Shareholders in respect of, in aggregate, 4,810,826 Ovum Shares, representing
approximately 38.96 per cent. of the existing issued share capital of Ovum.
Datamonitor has received valid acceptances in respect of, or has acquired, all
of the Ovum Shares which are the subject of such irrevocable undertakings.


Neither Datamonitor, nor any person acting, or deemed to be acting, in concert
with Datamonitor for the purpose of the Offer, owned or controlled any Ovum
Shares or any rights over any Ovum Shares immediately prior to the commencement
of the Offer Period.  Save as referred to above, neither Datamonitor, nor any
person acting, or deemed to be acting, in concert with Datamonitor for the
purposes of the Offer, has acquired or (other than pursuant to the Offer) agreed
to acquire any Ovum Shares or any rights over any Ovum Shares during the Offer
Period.  None of the valid acceptances referred to above have been received from
persons acting in concert with Datamonitor.


Ovum Shareholders are advised that, if the acceptance condition of the Offer is
not satisfied by 3.00 p.m. (London time) on 15 December 2006, Datamonitor might
not extend the Offer beyond 15 December 2006, in which case it would not be
possible to accept the Offer after that time and the Offer would lapse. However,
Datamonitor reserves the right to extend the Offer should it wish to do so.


Ovum Shareholders who wish to accept the Offer, but have not yet done so, are
strongly encouraged (in the case of Ovum Shares which are not held in CREST) to
complete and return a Form of Acceptance or (in the case of Ovum Shares which
are held in CREST) to effect an Electronic Acceptance, in each case as soon as
possible and, in any event, by not later than 3.00 p.m. (London time) on 15
December 2006.


Enquiries:


Datamonitor                                             Telephone: 020 7675 7000
Mike Danson

Rothschild (Financial adviser to Datamonitor)           Telephone: 0161 827 3800
Andrew Thomas

Investec (Broker to Datamonitor)                        Telephone: 020 7597 5970
Keith Anderson

Hudson Sandler(Public relations adviser to Datamonitor) Telephone: 020 7796 4133
Michael Sandler
Nick Lyon


Words and expressions which are defined in the offer document dated 10 November
2006 (the "Offer Document") apply to this announcement unless otherwise
indicated.


This announcement does not constitute, or form part of, any offer for, or any
solicitation of any offer for, securities.  Any acceptance or other response to
the Offer should be made only on the basis of information referred to in the
Offer Document.


The directors of Datamonitor accept responsibility for the information contained
in this announcement.  To the best of knowledge and belief of the directors of
Datamonitor, who have taken all reasonable care to ensure that such is the case,
the information contained in this announcement is in accordance with the facts
and does not omit anything likely to affect the import of such information.


Rothschild, which is authorised and regulated by the Financial Services
Authority, is acting as sole financial adviser to Datamonitor and no-one else in
connection with this announcement and will not be responsible to anyone other
than Datamonitor for providing the protections afforded to clients of Rothschild
or for providing advice in relation to the contents of this announcement.


Investec, which is authorised and regulated by the Financial Services Authority,
is acting exclusively as broker to Datamonitor and no-one else in connection
with this announcement and will not be responsible to anyone other than
Datamonitor for providing the protections afforded to clients of Investec or for
providing advice in relation to the contents of this announcement.


The Offer is not being made, directly or indirectly, in, into or from, or by use
of the mails of, or by any means or instrumentality (including, without
limitation, electronically or by facsimile transmission, internet, email, telex
or telephone) of interstate or foreign commerce of, or any facility of a
national, state or other securities exchange of, the United States, Canada,
Japan or any Prohibited Jurisdiction and, subject to certain exceptions, the
Offer cannot be accepted by any such use, means, instrumentality or facility or
from within the United States, Canada, Japan or any Prohibited Jurisdiction.
Accordingly, copies of this document, the Form of Acceptance and any related or
accompanying document are not being, and must not be, directly or indirectly,
mailed, distributed, transmitted, forwarded or otherwise sent, in whole or in
part, in, into or from the United States, Canada, Japan or any Prohibited
Jurisdiction. Doing so may render invalid any purported acceptance of the Offer.
Persons receiving this document, the Form of Acceptance or any related or
accompanying document (including, without limitation, custodians, nominees and
trustees) should not distribute, mail, transmit, forward or send them or any of
them in, into or from the United States, Canada, Japan or any Prohibited
Jurisdiction or use such mails or any such means, instrumentality or facility
for any purpose related to the Offer.


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