Rule 8.3- (Ovum Plc)

Close Brothers Group PLC
25 October 2006


                                    FORM 8.3

    DEALINGS BY PERSONS WITH INTERESTS IN SECURITIES REPRESENTING 1% OR MORE

              (Rule 8.3 of the City Code on Takeovers and Mergers)



1. KEY INFORMATION

Name of person dealing (Note 1)                              Close Investments
                                                             Limited
Company dealt in                                             Ovum Plc
Class of relevant security to which the dealings being       Ordinary
disclosed relate (Note 2)
Date of dealing                                              24th October 2006



2. INTERESTS, SHORT POSITIONS AND RIGHTS TO SUBSCRIBE


(a) Interests and short positions (following dealing) in the class of relevant
security dealt in (Note 3)

                                                 Long              Short
                                                 Number (%)        Number (%)
(1) Relevant
securities                                       354,736 2.93%
(2) Derivatives (other than options)
(3) Options and agreements to purchase/sell
Total


(b) Interests and short positions in relevant securities of the company, other
than the class dealt in (Note 3)

Class of relevant security:                        Long           Short
                                                   Number (%)     Number (%)
(1) Relevant securities
(2) Derivatives (other than options)
(3) Options and agreements to purchase/sell
Total


(c) Rights to subscribe (Note 3)

Class of relevant security:                        Details




3. DEALINGS (Note 4)


(a) Purchases and sales

Purchase/sale    Number of securities          Price per unit (Note 5)
Sale             40,000                        300p



(b) Derivatives transactions (other than options)

Product name,   Long/short     Number of securities    Price per unit 
e.g. CFD        (Note 6)       (Note 7)                (Note 5)



(c) Options transactions in respect of existing securities

(i) Writing, selling, purchasing or varying

Product  Writing,      Number of         Exercise  Type, e.g. Expiry  Option
name,    selling,      securities to     price     American,  date    money
e.g.     purchasing,   which the option            European           paid/
call     varying etc.  relates (Note 7)            etc.               received
option                                                                per unit
                                                                      (Note 5)
                                                                


(ii) Exercising

Product name, e.g.         Number of           Exercise price per unit 
call option                securities          (Note 5)



(d) Other dealings (including new securities) (Note 4)

Nature of transaction (Note 8)  Details  Price per unit (if applicable) (Note 5)




4. OTHER INFORMATION


Agreements, arrangements or understandings relating to options or derivatives



Full details of any agreement, arrangement or understanding between the person
disclosing and any other person relating to the voting rights of any relevant
securities under any option referred to on this form or relating to the voting
rights or future acquisition or disposal of any relevant securities to which any
derivative referred to on this form is referenced. If none, this should be
stated.




Is a Supplemental Form 8 attached? (Note 9) NO



Date of disclosure                                             25th October 2006
Contact name                                                   W.J. Jenkins
Telephone number                                               020 7426 4013
If a connected EFM, name of offeree/offeror with which
connected
If a connected EFM, state nature of connection (Note 10)



Notes


The Notes on Form 8.3 can be viewed on the Takeover Panel's website at
www.thetakeoverpanel.org.uk






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