Holding(s) in Company

Borders & Southern Petroleum plc
15 April 2008


For immediate release, 15 April 2008


                       Borders and Southern Petroleum plc
                                        
                                        
                TR-1: Notifications of Major Interests in Shares


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

Borders and Southern Petroleum plc


2. Reason for the notification

An acquisition or disposal of voting rights: ( X )



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

Morgan Stanley
(Institutional Securities Group and Global Wealth Management)


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


5. Date of transaction

10 April 2008


6. Date on which issuer notified:

14 April 2008


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

3%



8. Notified Details:


A: Voting rights attached to shares

Class/type of shares if possible      Situation previous to the
use ISIN CODE                          triggering transaction
--------------------------------------------------------------------------
                                   Number of      Number of voting
                                   shares         rights
--------------------------------------------------------------------------                                  
Ordinary Shares                    5,849,565      5,849,565



                                      Resulting situation after the triggering
                                                   transaction
-----------------------------------------------------------------------------------------
Class/type of shares if possible    Number of      Number of voting       % of voting
use ISIN CODE                       shares             rights                rights
-----------------------------------------------------------------------------------------
                                                  Direct    Indirect  Direct    Indirect
-----------------------------------------------------------------------------------------
                                                  Below 3%  Below 3%  Below 3%


B: Financial Instruments

Resulting situation after the triggering transaction

Type of     Expiration date  Exercise/conversion No. of voting rights % of voting
financial                    period/date         that may be acquired rights
instrument                                       (if the instrument
                                                 exercised/
                                                 converted)

Total (A+B)
Number of voting       % of voting
rights                 rights




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

n/a


Proxy Voting:


10. Name of 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:

Michelle Hewitt


15. Contact telephone number:

020 7425 8677






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