NOTIFICATION OF MAJOR INTEREST IN SHARES

TR-1 NOTIFICATION OF MAJOR INTEREST IN SHARES

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

BTG 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

M&G Investment Funds 3

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

Nortrust Nominee Ltd A/C MKK01

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

11 December 2009

6. Date on which issuer notified:

14 December 2009

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

See item 13

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

Direct

Direct xi

Indirect xii

Direct

Indirect

GB0001001592

12,864,692

12,864,692

13,018,857

13,018,857

5.05%

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

13,018,857

5.05%

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

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:

With reference to item 3, M&G Investments Funds 1 is an Open Ended Investment Company (OEIC) and is not a Prudential group company and must be separately disclosed. 

This OEIC Fund is managed by M&G Investment Management Limited (a wholly owned subsidiary of Prudential plc) and will have been previously attributed to Prudential plc solely on the basis that M&G Investment Management Ltd has direct fund management control over the shares identified in this notification.

Therefore the 5.05% holding being disclosed in this notification is encompassed in the 9.52% already disclosed under The Prudential plc group of companies and is NOT in addition to it.

14. Contact name:

Andy Burrows

15. Contact telephone number:

020 7575 1741