TR-1: NOTIFICATION OF MAJOR INTEREST IN SHARESi

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

Helius Energy Plc

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 to the
notification obligation: iii

FIL Limited

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

See attached schedule

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

22 October 2009 

6. Date on which issuer notified:

26 October 2009 

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

10%

8. Notified details:

A: Voting rights attached to shares viii, ix

Class/type of
shares

if possible using
the ISIN CODE

Situation previous
to the triggering
transaction

Resulting situation after the triggering transaction

Number
of
Shares

Number
of
Voting
Rights

Number
of shares

Number of voting
rights

% of voting rights x

Indirect

Direct xi

Indirect xii

Direct

Indirect

GB00B1GF9F36

8,462,494

8,462,494

8,494,732

8,494,732

10.03

B: Qualifying Financial Instruments

Resulting situation after the triggering transaction

Type of financial
instrument

Expiration
date xiii

Exercise/ 
Conversion Period xiv

Number of voting
rights that may be
acquired if the
instrument is
exercised/ converted.

% of voting
rights

C: Financial Instruments with similar economic effect to Qualifying Financial Instruments xv, xvi

Resulting situation after the triggering transaction

Type of financial
instrument

Exercise price

Expiration date xvii

Exercise/
Conversion period xviii

Number of voting rights instrument refers to

% of voting rights xix, xx

Nominal

Delta

Total (A+B+C)

Number of voting rights

Percentage of voting rights

8,494,732

10.03

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

See attached schedule

Proxy Voting:

10. Name of the proxy holder:

FIL Limited

11. Number of voting rights proxy holder will acquire:

32,238

12. Date on which proxy holder will acquire voting rights:

22 October 2009

13. Additional information:

None

14. Contact name:

Amanda Chana

15. Contact telephone number:

fil-regreporting@fil.com

FIL

FIL

Issuer name:

HELIUS ENERGY PLC

Current ownership percentage:

10.03%

Total shares held:

8,494,732

Issued share capital:

84,680,986

SHARES HELD

NOMINEE

MANAGEMENT COMPANY

FIL Limited (FIL) is the parent

7,929,600

BROWN BROS HARRIMN LTD LUX

FIL

holding company for various direct and indirect

526,362

BROWN BROTHERS HARRIMAN AND CO

FIJ

subsidiaries, including FIL Fund Management

38,770

JP MORGAN, BOURNEMOUTH

FIL

Limited (FFML), FIL Investment Services Ltd

(FISL), FIL Gestion (FIGEST), FIL

Asset Management (Korea) Limited (FIAKL),

FIL Investments Management (Hong Kong)

Limited (FIMHK), FIL Pension Management

(FPM), Fidelity Investments Japan (FIJ) and FIL

Investments International (FII), investment managers

for various non-US investment companies and 

institutional clients.