Rule 8.3- (Whatman Plc)

RNS Number:6366S
Cater Allen International Limited
18 April 2008



                                                                        FORM 8.3



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

                        (Rule 8.3 of the Takeover Code)

1.         KEY INFORMATION


Name of person dealing  (Note 1)                    Cater Allen International Limited

Company dealt in                                    Whatman Plc

Class of relevant security to which the dealings    Ordinary shs
being disclosed relate (Note 2)

Date of dealing                                     17/04/08





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                   1,446,686     (1.09%)


(2) Derivatives (other than options)


(3) Options and agreements to purchase/
sell
Total                                     1,446,686     (1.09%)





(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)
Purchase                   11,839                   GBP2.6875





(b)        Derivatives transactions (other than options)


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




(ii)        Exercising


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




(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.



ISDA Documentation ............................................................
.........



..............................................................................





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




Date of disclosure                                 18/04/2008


Contact name                                       Jens Philipowitz

Telephone number                                   0207 756 5392

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 http://
www.thetakeoverpanel.org.uk/




                      This information is provided by RNS
            The company news service from the London Stock Exchange
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