Holding(s) in Company

Byotrol PLC
19 December 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):

Byotrol Plc


2.      Reason for the notification (please state Yes/No):

An acquisition or disposal of voting rights: (Y)


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

An event changing the breakdown of voting rights: (N)

Other (please specify): (N)


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

        BlackRock, Inc.


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

n/a


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

13th December 2007



6.      Date on which issuer notified:



17th December 2007



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



5%


8.      Notified details:





A:   Voting rights attached to shares


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

GB00B0999995                      N/a                                N/a



Resulting situation after the triggering transaction (vii)


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


GB00B0999995                    N/a                      N/a         2,234,247                   5.00%



B:   Financial Instruments

Resulting situation after the triggering transaction (xii)


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






Total (A+B)


Number of voting rights           % of voting rights

2,234,247                         5.00%



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



BlackRock Investment Management (UK) Limited - 2,234,247 (5.00%)


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:



n/a



14.    Contact name:



Thomas Hone



15.    Contact telephone number:



020 7743 2098



Annex to Notification Of Major Interests In Shares (xvi)



A:     Identity of the person or legal entity subject to the notification
obligation:



Full name (including legal form for legal entities):



BlackRock, Inc



Contact address (registered office for legal entities):



33 King William Street, London, EC4R 9AS



Phone number:



020 7743 2098



Other useful information (at least legal representative for legal persons):



Thomas Hone





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