Notification of Interest

Serica Energy plc
08 February 2008

                               SERICA ENERGY PLC


TR-1:               NOTIFICATION OF MAJOR INTEREST IN SHARES



1. Identity of the issuer or the underlying       SERICA ENERGY PLC
issuer of existing shares to which voting rights
are attached:


2. Reason for the Notification -(please tick the appropriate box or boxes)


An acquisition or disposal of voting rights                                                        Yes


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):


3. Full name of person(s) subject to the         Caledonia Investments plc
notification obligation:


4. Full name of shareholder(s) (if different     N/A
from 3.):


5. Date of the transaction (and date on which    6th February 2008
the threshold is crossed or reached if
different):


6. Date on which issuer notified:                7th February 2008


7. Threshold(s) that is/are crossed or reached   13%


8. Notified details:




A: Voting rights attached to shares
Class/type of shares   Situation previous to    Resulting situation after the triggering transaction
                       the Triggering
                       transaction

If possible using the
ISIN CODE              Number of   Number of    Number of       Number of voting rights  % of voting rights
                       Shares      Voting       shares
                                   Rights       Direct          Direct       Indirect    Direct    Indirect
GB00BOCY5V57           20,311,736  20,311,736   23,311,736      23,311,736   N/A         13.21%    N/A



Ordinary US$ 0.10






B: Financial Instruments


Resulting situation after the triggering transaction
Type of financial  Expiration date    Exercise /          Number of voting    % of voting rights
instrument                            Conversion Period / rights that may be
                                      Date                acquired if the
                                                          instrument is
                                                          exercised /
                                                          converted.
N/A                N/A                N/A                 N/A                 N/A


Total (A+B)


Number of voting rights                          % of voting rights


23,311,736                                       13.21%


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





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:






Enquiries:                                                            8th February 2008


Company Secretary
Rob Tamburrini                    [phone]


Pelham PR
Alisdair Haythornthwaite          [phone]                 [phone]
Lucy Frankland                    [phone]                 [phone]




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