RNS


DJ San Leon Energy PLC Holding(s) in Company
TIDMSLE
RNS Number : 4784Y
San Leon Energy PLC
22 December 2010

TR-1: NOTIFICATION OF MAJOR INTEREST IN SHARES
------------------------------------------------------------------------------

1. Identity of the issuer or the underlying San Leon 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 X
-------------------------------------------------- --------------------------
An acquisition or disposal of qualifying
financial instruments which may result in the
acquisition of shares already issued to which
voting rights are attached
-------------------------------------------------- --------------------------
An acquisition or disposal of instruments with
similar economic effect to qualifying financial
instruments
-------------------------------------------------- --------------------------
An event changing the breakdown of voting rights
-------------------------------------------------- --------------------------
Other (please specify):
-------------------------------------------------- --------------------------
3. Full name of person(s) subject BlackRock, Inc.
to the
notification obligation:
---------------------------------------------- ------------------------------
4. Full name of shareholder(s)
(if different from 3.):
---------------------------------------------- ------------------------------
5. Date of the transaction and date 17 December 2010
on
which the threshold is crossed or
reached:
---------------------------------------------- ------------------------------
6. Date on which issuer notified: 21 December 2010
---------------------------------------------- ------------------------------
7. Threshold(s) that is/are crossed Holding has gone above 3%
or
reached:
---------------------------------------------- ------------------------------




8. Notified details:


----------------------------------------------------------------------------------------------------------------


A: Voting rights attached to shares


----------------------------------------------------------------------------------------------------------------

Class/type
of
shares
if possible Situation previous
using to the triggering Resulting situation after the triggering

the ISIN CODE transaction transaction


--------------------- ------------------------------ ---------------------------------------------------------

Number
Number of

of Voting Number Number of voting


Shares Rights of shares rights % of voting rights

--------------------- -------------- -------------- ------------ ---------------------- -------------------

Direct Direct Indirect Direct Indirect

--------------------- ------------ ------------ ------------ --------- ----------- -------- ---------

IE00B3CLK236 N/A N/A N/A N/A 14,825,000 N/A 3.29%

-------------- -------------- ------------ --------- ----------- -------- ---------

Subtotal A

(based on aggregate


voting rights 14,825,000 3.29%

----------- -------- ---------



B: Qualifying Financial Instruments


----------------------------------------------------------------------------------------------------------------


Resulting situation after the triggering transaction


----------------------------------------------------------------------------------------------------------------

Type of financial Expiration Exercise/ Number of voting % of voting

instrument date Conversion Period rights that may be rights

acquired if the
instrument is
exercised/

converted.


----------------------- ------------- ---------------------------- --------------------- -------------------



C: Financial Instruments with similar economic effect to Qualifying Financial

Instruments


----------------------------------------------------------------------------------------------------------------


Resulting situation after the triggering transaction


----------------------------------------------------------------------------------------------------------------

Type of financial Exercise Expiration Exercise/ Number of voting % of voting rights

instrument price date Conversion rights instrument

period refers to


---------------------- ------------- ------------- ------------- ---------------------- -------------------

Nominal Delta

---------------------- ------------- ------------- ------------- ---------------------- -------- ---------




Total (A+B+C)


----------------------------------------------------------------------------------------------------------------

Number of voting rights Percentage of voting rights

------------------------------------------------------------------- -------------------------------------------


14,825,000 3.29%


------------------------------------------------------------------- -------------------------------------------




9. Chain of controlled undertakings through which the voting rights and/or
the
financial instruments are effectively held, if applicable:
----------------------------------------------------------------------------
BlackRock Investment Management (UK) Limited - 14,825,000 (3.29%)

Proxy Voting:
----------------------------------------------------------------------------
10. Name of the proxy holder:
--------------------------------------- -----------------------------------
11. Number of voting rights proxy
holder will cease to hold:
--------------------------------------- -----------------------------------
12. Date on which proxy holder will
cease to hold voting rights:
--------------------------------------- -----------------------------------

13. Additional information: BlackRock Threshold Reporting Team
--------------------------------------- -----------------------------------
14. Contact name: Stuart Watchorn
--------------------------------------- -----------------------------------
15. Contact telephone number: 020 7743 3503
--------------------------------------- -----------------------------------


This information is provided by RNS
The company news service from the London Stock Exchange
END
HOLTTBFTMBITBPM
(END) Dow Jones Newswires
22-12-10 1649GMT


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