Holding(s) in Company

Diploma PLC
27 November 2007



TR-1(i): NOTIFICATION OF MAJOR INTERESTS IN SHARES

     
1.   Identity of the issuer or the underlying issuer of existing shares to which
     voting rights are attached (ii):

     DIPLOMA PLC


2.   Reason for the notification (please tick the appropriate box or boxes):                        

     An acquisition or disposal of voting rights:                      ( X ) 

     An acquisition or disposal of financial instruments               (   )
     which may result in the acquisition of shares already 
     issued to which voting rights are attached:  

     An event changing the breakdown of voting rights:                 (   )

     Other (please specify): Exemption DTR 5.1.3 (4)& DTR 5.1.5 (1)    ( X ) 



3.   Full name of person(s) subject to the notification obligation (iii):

     The Goldman Sachs Group, Inc.


4.   Full name of shareholder(s) (if different from 3.) (iv):

     Goldman, Sachs & Co.


5.   Date of the transaction (and date on which the threshold is crossed or
     reached if different) (v):

     23 NOVEMBER 2007


6.   Date on which issuer notified:

     27 NOVEMBER 2007


7.   Threshold(s) that is/are crossed or reached:

     4%


8.   Notified details:


A:   Voting rights attached to shares

Class/type of shares if possible using    Situation previous to the Triggering
the ISIN CODE                                       transaction (vi)

                                        Number of      Number of voting Rights
                                        shares         (viii)

GB0001826634                            680,572        3.00%



Resulting situation after the triggering transaction (vii)

Class/type of shares if        Number of  Number of voting      % of voting
possible using the ISIN CODE   shares     rights (ix)           rights

                               Direct     Direct (x)   Indirect Direct  Indirect
                                                       (xi)

GB0001826634                                           928,631          4.10%




B: Financial Instruments

Resulting situation after the triggering transaction (xii)

Type of     Expiration Exercise/       Number of voting rights that may  % of
financial   Date       Conversion      be acquired if the instrument is  voting
instrument  (xiii)     Period/ Date    exercised/ converted.             rights
                       (xiv)

Total (A+B)


Number of voting rights              % of voting rights

928,631                              4.10%




9. Chain of controlled undertakings through which the voting rights and/or the
financial instruments are effectively held, if applicable (xv):


The interest in 928,631 shares arose from an interest held by Goldman, Sachs 
& Co., a wholly-owned direct subsidiary of GS Inc, acting as custodian for its
customers. These shares are, or will be, registered in the name of Goldman Sachs 
Securities (Nominees), Limited.




Proxy Voting:


10.  Name of the proxy holder:

     N/A


11.  Number of voting rights proxy holder will cease to hold:

     N/A


12.  Date on which proxy holder will cease to hold voting rights:

     N/A


13.  Additional information:

     General email contact:

     [e-mail]


14.  Contact name:

     Sean Rogers/Alan Cox



15.  Contact telephone number:

     0207-552-9205 / 020-774-8774



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