Holding(s) in Company

Sound Oil PLC
16 August 2007

TR-1 NOTIFICATION OF MAJOR INTERESTS IN SHARES

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

Sound Oil plc

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

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: (No)

An event changing the breakdown of voting rights: (No)

Other (please specify): (No)

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

Credit Suisse Securities (Europe) Limited

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

N/A

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

14 August 2007

(6) Date on which issuer notified:

16 August 2007

(7) Threshold that is crossed or reached:

10%

(8) Notified details:

A: Voting rights attached to shares

Class/type   Situation previous to the
of share     Triggering transaction      Resulting situation after the triggering transaction
if possible  Number of     Number of     Number of
using the    Shares        Voting        Shares       Number of Voting        % of voting rights   
ISIN code                  Rights                     Rights   
                                         Direct       Direct        Indirect  Direct   Indirect

GB00B09VL556  67,577,636    67,577,636   69,344,356   69,344,356    n/a       10.01%   n/a

B: Financial instruments

Resulting situation after the triggering transaction

Type of     Expiration Exercise /     Number of voting rights that may   % of
Financial   Date       Conversion     be acquired is the instrument is   voting
Instrument             Period / Date  exercised / converted              rights

N/A

Total (A+B)

Number of voting rights                      % of voting rights

69,344,356                                   10.01%

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

Credit Suisse Securities (Europe) Limited is a part of the Investment Banking
division of Credit Suisse ("CSIBD"), which is part of the Credit Suisse Group
("CSG"). CSIBD is a segregated business unit within CSG with an indpendent
management structure and exercises its voting rights independently from other
divisions of CSG.

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:

Glenda Burford

(15) Contact telephone number:

[phone]





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